I really need to rewatch ep 8 in order to gather my thoughts on it. That said, I would love a Star Wars movie directed by Nolan, and Boba Fett could most benefit from his style. I really enjoyed Dunkirk and of course the Dark Night trilogy are incredible.
I also can't completely decide if I want a Boba Fett standalone movie, since I think it would be pretty hard to pull off one that doesn't reveal at least some of his mystery, which, in my mind, is one of his key and best defining characteristics (extra hate for the prequels there imho).