I have 14 in mind:
By The Velvet Underground: Candy Says(the older sister of Polly), Pale Blue Eyes, White Light/White Heat, Venus In Furs and I'll Be Your Mirror
By The Beatles: Happiness Is A Warm Gun(the grungiest John Lennon ever was), Julia, I Want You(She's So Heavy)
By Glenn Branca(the dude where Lee Ranaldo and Thurston Moore from Sonic Youth are guitarists of: The Spectacular Commodity (Dave would absolutely kill this shit in the drums)
By Black Flag: Nothing Left Inside(That's very self explanatory why this track just screams Kurt's identity)
By Daniel Johnston: Casper The Friendly Ghost, Despair Came Knocking, Walking The Cow, My Yoke Is Heavy(probably the song by Daniel that Kurt most likely related the most).
Honestly something from The Breeders’ Pod album, preferably Opened. Also no offense but I think Happiness is a Warm Gun is one of the worst songs ever written. I’ve never heard a version of it that I liked