Ultra is what I personally have been using for a while now without a single problem. But as I already said, there are plenty of other hosters with the same featureset, though I cannot make specific recommendations - but the seedboxes community on reddit may.
Regarding the DMCA, usually these hosters base their operations out of countries with lax or nonexistant copyright laws, allowing them to simply disregard incoming takedown notices. In Ultra’s case, they claim to forward copyright notices to the respective server owner, but I have yet to receive a single notice. Though I’m also exclusively on private trackers, maybe thats a reason too.