5 - IMO they’d all be great signings in different ways.
Davies - no transfer fee (albeit high wages) and is everything Amorim would want from a complete wing back.
Kerkez - has had a year or two to settle in the prem and has really kicked on this season which is a great sign. Might not be a technically solid as others but he’s quick, strong, makes aggressive runs and has outstanding determination.
Mendes - perfect age, has played the system before, possibly the best u23 LB/LWB in the world. Only downside is his injury record but at the reported fees I think he’s worth a shot.
Theo - obviously older than the others but he’s a physical beast and definitely should have a good 3 or 4 years in him at the very top. Arguably the best attacking LB in the world and again the reported fee isn’t crazy due to his contract. Would give the likes of Amass and Diego Leon room to grow and as he’d be tailing off in his 30s they would be breaking through at 21/22 y/o.