Soundgarden's Little Joe in terms of bass, I love the harmonics and constant improvisation. Great obscure gem from the kings of Seattle.
And you gotta love Mudhoney. True "grunge" ahoy:
Touch Me i'm Sick Mark Arm's belching..
Burn it Clean Raging riff in 5/4 that sounds almost classical influenced!
I'll stop there but I could go on for ages. I love "grunge"!