Please Help Me With This Music Trivia Question.

I think everyone in Boris has taken the mike at least once.

Depeche Mode, I think.
once you get to the duos, there is a slew of them.
Erasure, Tears for Fears, Hall and Oats, They Might be Giants and Wham all fit the bill.
Ween was originally just two members, but now have other members, not sure if that counts.