I have an Argyle season ticket (got one for BMD too for next season!) and there's some players that would be able to make the move to the premier league and would love Everton to sign.
Haji Wright
Mundle from Sunderland was one of the most exciting players I've seen this season
Borja Sainz from Norwich looks decent
And I'd agree with some already mentioned like Fellows, Rigg, Dan Neil etc
Get a few right from there and we could be ok.
Eze, Bowen, Gyokeres, Warton all prime examples of getting talent in from championship.
I'm hopeful and excited about a transfer window for the first time in ages. Getting rid of dead wood, especially DCL, and getting new players in. Let's hope!