All this being said, my choices were dictated by the above. And to make a long story short, I use Steinberg Cubase Pro and Steinberg Nuendo, the latter mostly for work on movie score and for Dolby Atmos.
Now does this mean I would recommend these products to you? No, because so far I don't know what you're actually doing in terms of recording/mixing work and what your mid to long term plans are. I don't even know why you have used Reaper and Studio One in the past and why they haven't become your weapon of choice.
So I would kindly ask you to provide some info on what you're currently doing and what you're planning to do in the long run.
Do you really need one of the "big" solutions? Would you rather go for a smaller or medium solution with the option to upgrade to the big, professional solution without starting from scratch? Do you need a (relatively) simple solution that doesn't kill your creative moments with its complexity or do you need something that has all the bells and whistles in case you need it?
And last but not least (before we might get into more detailled discusion) ... your statement regarding third party plugins. I totally understand what you mean by "expensive rabbit hole". (Waves plugins would become a rabbit hole in no time, by the way)
But keep in mind that even a lucky bastard sitting in front of an actual SSL console every single day can't get the sound he's looking for without "some" outboard gear. You basically just need to figure out what exactly you need and why. Stay away from plugin hoarding! And stay away from plugin subscriptions!
I might be able to help you in this field as well but let's try to walk one step after the other, haha.
Cheers
Martin