Right now I'd take Lukaku and Kante as well. Granted I think Pogba has higher 'potential' than Kante, and he showed that early this season, but he's gotta come back from his injury and pick up at that same place before to really get credit for it. Until he does, Kante wins out. And even if he does, it's still not a gimme. Kante's been pretty close to the MVP of two straight title winning sides.
And LITN, in terms of defenders right now, United has Bailly who is a rock solid starter. Smalling who might be a decent 3rd defender or rotation option. Jones who's alright as a rotation option but shouldn't be starting against top teams. Rojo is injured, but I'd put him in the same class as Jones. Blind isn't a natural CB. Lindelof was supposed to be that second starter behind Bailly, but he's been hot garbage this year. Hopefully he can get back on track because he definitely has potential.