I always enjoy support characters in RPGs. My favorite moments are always when two characters come together to do something incredible. I remember playing the Warlord class in 4e D&D. I thought it was such a cool take on a 'healer' and eventually we did some disgusting things as a party (like a full turn of increased crit chance).
I love Gloomhaven, haven’t been able to try the Frosthaven tabletop game yet. Can’t wait to try the digital version!
My favorite RPG role is typically caster/controller, especially in TTRPGS. But, honestly, I usually end up as GM, so… all the roles.