Man, if you're after that unhinged, 'what is even happening right now' brand of fantasy, my first thought always goes to China Miéville. The guy built a city on the corpse of a god and filled it with cactus-people, sentient tattoos, and reality-altering nightmares. 'Perdido Street Station' is a masterclass in taking the weird and making it feel lived-in and grimy. It's not whimsical; it's oppressive and glorious.
Then there's Jeff VanderMeer's 'Southern Reach' trilogy, though that's more new weird than pure fantasy. The worldbuilding is a character in itself, shifting and incomprehensible. For sheer, chaotic, kitchen-sink energy, you can't beat the 'Discworld' in its earlier, more frenetic novels. Pratchett threw everything in there—trolls, witches, a flat world on elephants and a turtle—but somehow made it all work through satire.
Lately, I've been obsessed with Tamsyn Muir's 'The Locked Tomb' series. Spacefaring necromancers, swordfighters, and a civilization built on bone and thanergy? It's dizzying. You're just thrown into this dense jargon and have to paddle like crazy to keep up, but the payoff for that disorientation is immense.