@joop A hundred is perhaps an exaggeration, and I don't know as many as I would like, but I because particularly fond of a wheat-paste poster-maker named Morley for a while. There's also Guerilla Girls who are sorta well-known and half street art half formal design sort of stuff.

I actually just found out about http://accessibleicon.org/ today, which is a form of street art and design activism centering around disability activism.

I haven't engaged with my love of street art for a while so I've lost a lot of who I knew, and I want to know more non-white, non-male (etc.) artists, because my own knowledge is horribly limited.