Does anyone else utilise the entire cast of characters?

When I play I always try to incorporate everyone into a team role , we are a band of misfits trying to save ourselves and the world (sometimes) so I don’t like people on the back benches.

Usually I have my main four party members, a dedicated charismatic seller , a sneaky thief, two back up fighters and a buffer or two.

Which makes perfect sense to have everyone doing at least something, does any one else do the same or are you just a four man band and that’s it?