Sanderson's own works are good. My favorite set (though they're all technically interconnected, but we're talking sharing a creation story that doesn't always get talked about and one minor character who hops around between them) is The Stormlight Archives, which starts with The Way of Kings. The Stormlight Archives stands out in my mind as the series that puts the "fantastic" back into epic fantasy. So much of its peers are well-trod reskins of medieval Europe with some magic sprinkled over top. The world of the Stormlight Archives is one in which (magically) violent storms proceed across the continent with regularity, and it shows in every aspect of the world. Plants have evolved to essentially withdraw into hard shells during storms, most animals have hard carapaces, societies are built around weathering these storms, and so on. So even the flora and fauna are weird and alien to the reader, in a manner you see more often in science fiction than fantasy.

As for other fantasy series -- if it doesn't have to be epic fantasy, my favorite is Jim Butcher's The Dresden Files, which starts off with Storm Front. It's modern urban fantasy, where wizards and monsters live among us. Harry Dresden is an oddity even among wizards, in that he practices in the open -- he's in the Chicago telephone book under "Wizard" and combines his arcane practice with a PI license. He consults with the cops sometimes on "the weird stuff", where most of the folks roll their eyes and think he's probably a kook. The series is great -- they read quickly, have a good sense of humor, and detail a rich world with a very grounded and consistent magical system. There's political intrigue between various factions in the magical world, and it's a long-running series (currently on book... 16?) that packs in a lot of details and connections that reward close reads and offer fertile ground for speculation and theorizing. Butcher is prolific -- until recently he was publishing a book every year to year-and-a-half. So while his publisher has encouraged him to take a brief break and not burn out, I actually anticipate him completing his planned ~22 books before, say, Game of Thrones finishes up in print.