This will probably turn into a "my list is more obscure/seminal than yours" contest. Mine is fairly mainstream except one 
The Stone Roses - The Stone Roses
Pink Floyd - Wish You Were Here
Furniture - The Wrong People
Green Day - American Idiot
Nirvana - Nevermind*
*I'm going to admit I haven't listened to it for years but it is certainly a "must listen".
I'm afraid all current music is ruined for me by autotune, whatever other merits it may have. Whiny attenuated vocals actually hurt my ears.
Actually, you did remind me how sublime
The Wrong People is, I remember buying for £3.49 from Our Price in Nottingham before Stiff went belly up and copies became career-tanking unobtanium. Is now available on Apple Music, though the follow-up, which I also remember as being rather good,
Food, Sex and Paranoia, is not. Which means it's on vinyl in the attic.
Some other must-listens:
Curve
Doppelgänger, a splenetic wall of guitars that never left a decent hook behind.
Guns n' Roses,
Appetite for Destruction. Probably not my genre, but for reasons I saw them live at Nottingham Rock City back in the day and Axl Rose did a characteristic hissy fit 20 minutes in and I don't think he came back.
Nine Inch Nails,
Pretty Hate Machine. Probably not the sort of record to get your gran on the dancefloor at a wedding bash.