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).