There’s the capacitive/touch key route geared towards modular - Sputnik, Verbos, Future Retro, Keith McMillen. I’ve messed around with the Verbos in a shop. Very nice, limited of course compared to larger more traditional key/midi controllers. The capacitive touch is a bit odd to get around if you’re used to traditional keybeds. Works amazing for pads or sort of expressive playing, but not so great for staccato or quick runs for instance. Plus, sweaty fingers can effect the play so if you’re playing live and need tight response, probably not the best. I believe the Sputnik and Verbos are supposedly very similar.
The Future Retro 512 is a capacitive touch controller that sort of tries to bridge the gap of more traditional controllers and the modular key controllers. Has a great feature set, light & portable/fits in a rack, has CV I/O, Midi/CV, arp, sequencer, etc. I had one for a while and I liked it. Went down the generative sound generating rabbit hole so it became kinda superfluous and sold it. Out of the capactiive touch keys I’ve seen, this is the best. Though the color scheme is a bit much for some and the PSU plug in on the face is kinda annoying at times. Also, a tad pricey but it’s a boutique kinda company and a boutique kinda instrument.
Haven’t had any exposure to the Keith McMillen. And off the top of my head, don’t know what it’s CV abilities are.
Arturia’s Keylab are solid for what they are. I’d second what others have said. A little finicky to get up and running, but once it’s programmed, very solid. Though it sounds these might be a bit overkill feature-wise for you. Their Keystep are kinda the king of cheap(ish), portable plastic midi controllers. Also, I’ve never used the CV function in the Keylab, so can’t comment on that. I see the Keystep and Beatstep being used very heavily with CV/modular setups, so it must work to some degree.
In the vintage realm, the Fatar controllers are fantastic for playing. Though I don’t think any had CV. Great action and feel. Though you need to find one that isn’t beat to death or who’s only need is a good cleaning. A bit clunky to be hauling around compared to a lot of other stuff out on the market now.