I like Jamal Lewis far more than Max Aarons, excellent dribbler for a fullback and a better defender. I've been surprised watching them both that Aarons has been more hyped. Funny that three of Norwich's four back line members have been quite touted despite shipping the most goals in the league. Farke's system does them no favors and they're all very young to be fair. I think Buendia is the best player on that team currently, elite chance creation figures for such a low scoring team.
Aside from the obvious Grealish who I rate extremely highly, Lewis, Bowen, or Brooks would be my picks. Ake maybe. All talented young players who would help us in positions of need. Don't get this talk that we're Man Utd and we're above signing relegated players. SAF took advantage of loads of bargains. Some key players to title winning teams have come from relegated sides (which is also why that talk about Maguire being relegated with Hull is so silly - so was Robertson). Don't think any of the players I listed would immediately be key first team members (aside from Grealish who is clearly very talented and would probably only be a backup because Pogba and Bruno are in his way), but they'd all have lots of time to develop and step in as solid squad members.