Welcome, David, and may I say "well done" for choosing the correct subforum when almost all noobs get it wrong by asking for Profile suggestions in the "Introduce Yourself" one.
You didn't mention any preferences, but here're my current faves. Sorry if this is redundant for those who've seen me say this before:
Bert Meulendijk:
I've bought all his stuff. His "big" packs are smorgasbords of mix-ready, vibey, characterful, mucho-mojo Profiles. Can't go wrong with him. Huge proportion of "keepers"; if his Profiles were women, you'd marry most of 'em ("keepers" - get it?).
Guido Bungenstock:
I've bought all of Guido's stuff too. Perfect compliment to Bert's offerings in that they tend to cover the heavier end of things with more gain. Each pack's small, cheap and contains cleans through to heavy. Fuller sound than Bert's stuff, but that's 'cause Bert carves out the frequencies that you'd end up losing whilst mixing anyway.
CiliLab:
I love Ivan's choice of mic's and preamps, and the "authentic vibes" he captures when Profiling. His JVM pack, for instance, is still IMHO the definitive JVM capture to my ears. If you're into authentic, "phase-issue-free" heavy vibes, Ivan's your man. Definitely recommended if you're into heavy stuff.
Michael Britt:
Although he's a country-pop guy, he's ventured into heavy territory recently, at least more-seriously than previously. His Crunch 'n Go Pack, the most-recent, is a nice little collection of ballsy tones. His older stuff covers clean through to crunch admirably and exhibits his shared (with me) aversion to phase-anomalous offerings.
SinMix:
If you're into super-heavy stuff and don't mind having an ice pick chiselling its way through your eardrums, check him out. The ice-pick reference is because he employs the angled-mic, high-end-emphasis techniques that induce and exploit phase cancellation, something my hears don't like, but it has its place especially for cutting through dense metal mixes, and many swear by him. There's a huge free pack floating around so you don't have to pay to audition.
The Amp Factory, ChopTones, Top Jimi and others that have been around for a long time all have their fans; I'm not in a position to recommend them 'though as I don't own any of their stuff.
Lastly, if you haven't already, check out the free Rig Packs in Rig Manager (also downloadable from the Kemper site), where you'll find Kemper-selected morsels from Guido Bungenstock, Bert Meulendijk, Michael Britt and a bunch of others. Free auditioning, so highly-recommended.
HTH, mate.
EDIT:
To save your having to find it, here's SinMix's free heavy pack that I spoke of:
Metal Recording Pack v06 2017-07-07.zip