Phil Foden in the 8 role if Bernardo leaves, he has the workrate, technical ability and passing range to be a real star in that role.
Phil can play any and all roles - generational talent. I think to get the best out of Grealish though, he needs either an overlapping LB or playing in the 8 and I think there's something to the idea that he was bought with Bernardo's sale in mind.