These are the two most seminal comedy shows in my world, and they are (gulp!) 30 years old!
These are just links to IMDB, not the actual shows.
Emo Philips Live at the Hasty Pudding 1987
I found the LP record of this when I was working at the Tufts radio station and I pretty much memorized it.
A Steven Wright Special for HBO, 1985
He came to Tufts and completely killed it!