Led Zepplin's Dazed and Confused is super easy...it is actually the easiest bass song I've ever played.
Immortal Corruptor by GWAR. Schism Lateralus Jerk-off Jimmy 46&2 H. All by Tool. Anesthesia - Pulling Teeth by Metallica. Any Misfits song is easy as hell. Same with Nirvana. Sinister Minister by Bela Fleck and the Flecktones.
Easy but kickass bass lines: Another One Bites the Dust (Queen) How Many More Times (Zep) Man in the Box (Alice in Chains) - I think it's only 1 note Epic (Faith No More) - another 1 noter, lotta thumb action My Sharona (that band who did My Sharona)