Black Juju by Alice Cooper
Total Agreement ... I brought this song up in a post a couple yrs. ago (too lazy to go look for it thou). With their obvious love for the old Alice Cooper Group stuff, it has always boggeled my mind that they have never sunk their teeth into this gem ... tailor made for the Melvins without a doubt!
Others??
Anything by the Fugs
Anything by the Blasters
Annalisa - PIL
I'm a Boy - The Who
Journey to the Center of the Mind - The Amboy Dukes
Damaged II - as in the very awesome Pussy Galore version of this classic Flag jam
Too Parter, Jimi, Mexican Carvan, BBQ the Pope ... pretty much any Surfers stuff (the Melvins cover of Cherub was too fuckin awsome to leave the worship there)