Yes, ever since the class of 92, Marcus Rashford is the most exciting for me.
Two seasons now Rashford showing glimpse of capabilities in carrying the team as striker, plus his improvements and hence potential is scary. He have a good mentality too and shows fire in his play. Overall, very impressive and highly promising. Pogba too technically, but his education is more at Juventus, not here. After them, I suppose Andreas Pereira.
No offences, but I find the others to be exciting just temporarily; Macheda just for a few matches then he seems to be out of depth fading into non-existence, Januzaj just that one thrilling season after which then he suddenly becomes.. poor, Welbeck for a lot of matches then gradually his limitations becoming obvious.