I’m going to chime in, given the tastes mentioned in the OP, and also suggest a Pixies and Sonic Youth record. The ones mentioned are indeed the most acclaimed ones: Doolittle and Daydream Nation. But I came to the Pixies and Sonic Youth from a little different direction, with similar tastes to yours in the early mid-90s: I liked most Seattle bands, wasn’t big on U2, loved Guns N Roses. I’m going to suggest trying Trompe Le Monde by the Pixies and Dirty by Sonic Youth. For me, those were a little easier to get my ears around before delving into the more classic albums of their catalog. That said, I probably would’ve done okay if Doolittle was my Pixies introduction, but I think Daydream Nation would’ve been a little too different for me to appreciate. Dirty has all the hallmarks of Sonic Youth, but with a more pop-oriented songwriting approach, for lack of better description.
One caveat is that these are not the “definitive” albums of the respective bands, and probably doesn’t fit the criteria of “albums that everyone has heard.” They are, however, bands that any music aficionado would have heard of, so worth exploring just for the band.
A couple more of my suggestions of “important bands” but not necessarily “stuff everyone has heard” would be XTC and Big Star. For XTC, I would recommend English Settlement, and for Big Star, well, just get the #1 Record/Radio City albums, which are often sold together.
I was going to mention Smashing Pumpkins as well, but I see that’s covered. There’s not a bad song on Siamese Dream, IMHO.