To be completely honest isn't the worst choice ever but I do think his ball control is below average and could cause some huge problems in the league especially with the constant high pressure teams are using in the top half.
My favorite though out of the ones I listed is Sander Berge. He's an absolute unit (6'4") and boasts a 88% pass completion, 58 passes/90 (better than gana and gomes, tied with schniederlin), ~65% open play duels one, ~65% aerial duel wins (73% won in Europa), 47 successful tackles, 24 interceptions, and 79% tackles won.
I do agree though that Rebic would probably be better than Haller in the league and in our fluid front 3 style that Silva likes.