So I grew up very sheltered and isolated from society and as a result missed out on a lot of pop culture and other common things. I love to read, and I really enjoy fantasy and DnD and those types of things and I'm trying to find and catch up on the great fantasy books/series that every fantasy lover/nerd should know. I'm not as interested in sci-fi, but I'm willing to read the "great" ones too. What would you recommend?

Series I've read: The Lord of the Rings The Witcher The Dark Tower The Ultimate Hitchhikers Guide to the Galaxy Dungeon Crawler Karl

Update to add also read: Wheel of Time Most of the Stormlight Archive The Hobbit

I'm just starting my first Discworld book.

Edit: Thanks everyone! Keep them coming, I'm going to make a list with all the suggestions and start working through them.