I would guess that Raymond Pettibon, Mike Kelly, Robert Longo, etc.. are all influenced by Warhol. Sonic Youth were influenced by him (I saw some Kim Gordon art once in Gotebourg, Sweden)
Anyone trying to do artistic things in a commercial field (or the other way around) is influenced by Warhol.
What about Damien Hirst, Jenny Saville, Gavin Turk, and those other british artists from the Saatchi collection? That's all very Warholian in my opinion:
http://en.wikipedia.org/wiki/Young_British_Artists