Sticking to the not-quite-top-class players that played at least semi-regularly:
2012/13 Valencia definitely gets in - that was the season he began his deterioration from one of the best wingers around to a menace to full-backs' shins. But he was still a bag of energy and contributed some vital assists. Can replace Rashford in this team and play Sancho on the left
2014/15 Fellaini gets into this midfield for sure, 2009/10 Gibson has a shot
2008/09 O'Shea makes the right-back spot his own.
Out of those guys, O'Shea has the best chance of being a star for us.
Berbatov, Nani, Park and Fletcher are no-brainers, but hardly names I'd put in a list of our "worst" players. And shouts in this topic that I don't agree with:
Forlan - not the version we had anyway, scoring goals at about the same rate as 2020/21 Martial. If we can have the 2004-10 version then yes
Macheda - bang-average footballer who produced two massive moments for us - his career since then tells me he's not offering us anything we aren't getting from the kids in the squad right now (Garnacho and co)
Smith - completely mediocre, both before and after injury. Would add nothing to this team in midfield (which is saying something) or up front
Djemba-Djemba - again, I know our midfield is in a state but let's not get carried away, folks - this guy left us at the age of 24 and did virtually nothing for the rest of his career.