It's a tricky one. As the kind of player he is, he'd most suit a top half PL clubs style but they mostly aren't looking to loan a raw United kid. Much of the bottom half that do will be more worried about relegation and play a more pragmatic style that doesn't really suit him, and they probably would prefer safer options than a bit of a wild card like Hannibal is at this stage.
Burnley is a decent shout, but there probably aren't too many others in the PL. Like you say, he could go to a decent team in a smaller top flight like Holland. Would another championship loan, but at a team expected to challenge at the top like Leicester or Southampton - or Sunderland, given how Mowbray worked with Amad - be better than a top flight league abroad?
It's a difficult one as he has a hell of a lot of ability and potential, but it's raw and he's very much a rough diamond who is still a little bit of a gamble temperament wise at this stage. So it's tricky, but important, to find the right club who play a suitable style, and are prepared to gamble on him as a key midfielder as he hones that potential.
I really rate him, and think a young raw Bruno was a good comparison. It's about him getting the opportunities to hone that potential, and mix of good technique, competitiveness and endless energy, the right way.