#1
does anyone know a good basline in chords plz
need something nice to play

something like the "Seven nation army" intro
#2
i would probably suggest les claypool of primus, and his rendition of metallica's "master of puppets" as far as i know the introduction for sure is using chords the rest of the song could very well be also, but thats my suggestion.
#3
first, seven nation army is all guitar, drums, vocal. no bass, its a electro haromonix pog/hog.
but play the song know your enemy by Rage against the machine, its a sick bassline