If normal funk is allowed, then clearly the whole P-Funk mob; Parliament, Funkadelic, Bootsy's Rubber Band, George Clinton, P-Funk All-Stars, Zapp, Brides of Funkenstein, etc. Parliament's "Mothership connection" is my favorite record of all time!!
Also James Brown's 70's stuff. The best record I have by him is "Reality". Great record!
Kool & the Gang (up til and including '76. Their first disco record, "Open Sesame", from '76 has two good songs, the rest is crap!)
Graham Central Station
Isley Brothers (although their 70's stuff is more a mix between funk and soul)
B.T. Express
Mandrill
Isaac Hayes
Commodores
I could go on...
I really haven't listened to much mix of funk and metal/rock. I wouldn't exactly call Faith No More a mix of it, but maybe that's just me. I think Living Colour mixes it a little, although I mainly see them as rock/metal.
I remember when I was a metalhead, The Chili Peppers was not really tough enough for me and now/when I got to be a funkhead (well, I don't listen to that much funk anymore, I listened to it all the time a couple of years ago), they're not really funky enough. I still think they've done some decent stuff though. I can't really stand their two latest records though!! It sounds gross and all the songs sound the same (well, except for "Roadtrippin'"). And then when they try to be more funky, like on the first single from their latest album, they of course put that gross chorus in that destroys everything!! The funky part of it is not that good either anyway.