Tricky one, cause all the artists I can think of have *some* swearing and stuff, even if it’s not full of it, NWA style.
Mos Def, Talib Kweli, Common, De La (as said above, avoid De La Orgee), maybe some Pharcyde? Q-Tip, Beasties, Slick Rick, possibly The Cool Kids?
Some of those may be unsuitable too to be honest, but might be worth having a listen to see.