Colleague of mine works primarily on Portuguese football and he's been really pushing Mannu (remove one n - autofilter keeps correcting it to Man Utd) from Vitoria. Hyping him as, at worst, a William Carvalho type midfielder. At best, Portugal's Poundland Rodri.
He's so under the radar that he doesn't even have a YouTube comp. Statistically he does look very interesting. Sky high defensive numbers while also being a really progressive passer. Also has one of the best aerial duel win % AND aerial duels contested of any midfielder in Europe. On the other hand, he's already 23 and still at Vitoria so who knows.
Would be nice to get a very physically imposing, aerially dominant midfielder for peanuts.