Tone issues.

I had similar issues and found that using external boost pedals got me there. I treat my Kemper like any other amp.

I can only watch the first clip (due to country restrictions), but that sound there is bread and butter, if you have a strat with single coils. A boosted Fender profile will get you in the ballpark. I'm not sure about the Rig Exchange, but I have a good few profiles from TAF that nail that sound. Britt, Guido and Bert all have variants, and TopJimi has a few amps that get there, too.

@Sorrelity
in example 2 I hear an octave up (by a full wave rectifier) effect - use Recti Shaper to get this.
example 3 it's a fuzz, probably a eq-ed Fuzz Factory

please try PITCH Wide Fuzz Oct from the Rig Exchange,
as well as Musket Fuzz, but be aware that you are aiming for highly post processed guitar sounds,
then again, the fact that Muse owns a lot of Profilers and performs with them live should tell you something about what's possible with this box

What is your set up? Are you going through a cab or FRFR ?

I can't listen to the samples I'm afraid but I use heavy gain sounds with no front end pedals into a 4 x12 like a regular amp..

As @V8guitar mentioned, you need to provide a lot more detail on your current setup. There are so many factors that come in to play when trying to emulate a specific sound (cab/speaker you're using, guitar, pickups, even playing style, etc.).

I can tell you that for quite a while, I was in your same position though. I literally went through HUNDREDS of commercial profiles and had found none that I thought sounded good. But, I kept going and eventually came across some Marshalls from TopJimi that blew me away (and I'm not even a Marshall guy). Since then, I've decided to sell my tube amp rig. You need to be playing through the right speaker, and have the right profiles in order for the Kemper to sound good with distorted profiles (IMO). Clean profiles are a lot easier to find.

Concerning profiles sound mufled - please check that your pure cabinet settings. If it is enabled - turn it off and compare.

As for the tones, Muse use some kind of fuzz on both tracks. And if you look at the market for a fuzz pedal there are tones of them and all sound very different. Go through all fuzz pedals available on kemper and try to find the one that will put you closer to the Muse sound.

As for Eric Johnson tone - it is a holy grail for many. First thing about his tone is the the way he picks notes and does vibrato. That contributes to the tone more than anything else. Second is his guitar - strat with quite bright pickups. And he does turn down tone knob on bridge pickup to about 5-6. Third, for his solo tones he usually uses Marshall Plexi amp with volumes turned up to 10, which brings up a lot of power tubes distortion and speakers distortion as well. And the last but not least he uses Tube Driver pedal which gives smooth reach and compressed tone. And of course don't forget about tons of delay (he usually have two delays set to about 300-450ms).

So if you want to get his tone - find Marhsall Plexi profile that was profiled with volumes on 10. Put a distortion pedal in front (we don't have tube driver in kemper but some other with high compression should work). Get a strat guitar, switch to bridge single coil pickup, play around with tone knob. And don't forget to add delay (i prefer tape delay). And now learn his picking and vibrato technique.

Quote from Sorrelity

I have headphones going into my kemper. I just find that every profile I use sounds very digital and almost muffled down sort of.

Headphones can be a problem. What kind of headphones do you use?

Quote from Sorrelity

I can upload a few clips of me playing and maybe you can see what I mean.

Please do. This will help a lot.

Quote from Sorrelity

they literally all sound the same.

I'd start with a general check of the Profiler's settings. I've posted a"first use" tutorial for the basic settings (Input, Output and the like) in one of my own thread, I'd suggest you give it a good read and check your settings.

Also, you did not tell us what your setup is. Hard to further help you ...

On a more general note, your tones don't sound all the same to me. You should realize that a great tone mostly lies in the hands of the player. The clips you've posted are of great musicians, which have devoted years to develop the quality of their tone(s). Specially the picking hand's technique is relevant to achieve this goal: the pick you choose, the way you hold it, the way it hits the strings and releases them... and then your vibrato... lots of things are involved in a great tone.
My best advise (apart from properly setting the unit as per above) would be to devote time to developing a good technique: this will give you gratifications you'll never find in an audio device.
Ah, and don't sell your Profiler: it's an amazing piece of gear which will follow your progresses in the years and grow with you!

HTH

Quote from Sorrelity

I know a heck of a lot of the tone comes from the playing, but it's mainly the gear that creates the tone in my opinion.

Well I've been there. It is not that simple. Tone comes from the all the nuances of your playing. The gear just emphasizes it. The more I play the more I realize that whatever gear I play I get the same tone with a slightly different character.

The same with all musicians. Eric Johnson sometime uses Marshall Plexi and Tube Driver or sometimes Dumble amp. But his signature tone is still the same. Andy Timmons on the recording of Resolution it is mainly Marshall Plexi with Tube Driver in the front. But live he uses MesaBoogie Lone Star with BB Preamp. Sill the same tone, slightly different character. Allan Holdsworth has been playing different amps at the different times of his career. But his signature tone is still there. I can go on and go on.

Your sound clips sounded somewhat weird, so I would suggest you to do a system reset and check if it helps:

Reset Corrupted System Settings
(NOTE: all your system settings will be erased, not your rigs):

switch the main knob to off;

wait a few seconds;

hold the System key;

switch Profiler to tuner while still holding the System key.

Quote from Sorrelity

Can you send that too me? You have no idea how much I want to get these tones. I'm so demotivated to play and practice when no matter how well I can play a song it just doesn't sound like it does on the record.

I can't share the profiles, as they are commercial profiles, but what I can do for you is have a look on Rig Exchange for something in the ballpark, then tweak it and share my tweaks. Now just to find the time...

Edit : a quick noodle with a tweaked Rig of a stock Kemper Vox profile, played on my tele (strat would be closer) :

Link to profile, if anyone's interested
Credit to Maurizio and Kemper!

These tones are available right on the kemper, no pb, you'll figure it out. Tell us more about your gear ?

laying with headphones is not the best option to setup a tone, you need room level signal like a FR monitoring system or poweramp & guitar cab.

I'd suggest the system reset as your samples sound muffled , and starting from scratch again but without the headphones. The first vid is about stratocaster , so you'll need a good one to mimic this kind of tone, a SSH ibanez-like won't give you the same kind of tone.

Another question, have you ever owned a real tube amp ? The kemper reacts just like them but with much more options, but this can be overwhelming.

PS : about your question on my rigs used on my track 'singing les Paul' , I did not keep them as they were tweaked on the fly during the recording, as I always do to adapt to my needs on my mixes.

Anyway, I did put a similar lead tone on rig exchange a while ago ( search for ATM.JB.drive.chordal.lead )

Another quick noodle, this time with my strat-type guitar, though it has lipstick pickups :

Profile is here
Edit : sorry for the clicks! Had my spdif sync set to internal, not KPA. Doh!

Here is me noodling on the start neck pickup with 2 different profiles.