Lazy macro question

Due to an injury I am only able to use a few fingers on my left hand, which class would be the “best” at one buttons for dps/tanking? I’d prefer not to heal as I don’t feel confident doing that with the injury.

I don’t think it matters too much because now most classes have been simplified in WoD, but ranged would seem the easiest due to not having to move around as much as melee. However, that being said a melee class like Rogue with mostly instant cast attacks would also be good.