If you’re thinking about the Fallouts, don’t forget all the Infinity Engine games (Baldur’s Gate 1 and 2, Icewind Dale 1 and 2, Planescape Torment), and Neverwinter Nights, and Pillars of Eternity 1 and 2.
And Shadowrun (Returns, Dragonfall, Hong Kong).
There’s a universe of amazing isometric RPGs out there.