I use this party limit removal mod, so I usually bring anywhere from 4 to 8 companions. When limiting myself to 3, though, I bring Karlach, Wyll and Shadowheart.
When I want to do things that are in a moral grey area if not downright evil, I swap out Karlach and Wyll for Astarion and Lae'zel 😁
I'm doing the same. With that setup, kb&m isn't practical. There are still some bugs with controllers though, so being able to switch to the mouse real quick is occasionally useful.
Personally the only problem I've had playing with a controller is that neither of the two vanilla interfaces can accommodate a party size of more than 7 including the Tav well and the mod to fix that isn't compatible with the controller one. That's pretty minor though, since it's purely cosmetic and off to the side 🤷
Linux PC, 4k TV, and controller. Very comfortable setup.
I can do everything with a controller although I do not know how to end a concentration spell after a fight. I will try to find the answer now that I am thinking about it.
Open the radial menu for the character that is concentrating so hard and navigate to that spell. When hovering over it, you'll see options in the lower right corner of screen. It shows to hold ( Y ) down to cancel concentration.