Shadowrun runs entirely on d6 dice. If you’re not big into crunch, I’ve run multiple campaigns of the rules-lite version that’s focused on storytelling called Anarchy. It needs a little home-brewing, imo, but is a good way to run it with folks that don’t want to play Spreadsheet: The Gam.e

Yahtzee

star wars d6 was pretty fun. and i dont even like star wars

Deadlands is a fantasy horror wild west rpg run on d6, my personal pick is Traveller the og far future scifi game with lion and wolf people.

Blades in the Dark is a cool heist and organized crime drama ttrpg that uses d6 dice pools (usually not too many, 1 to 5 total)