I'll omit Pogba, Cavani, Bruno and Mount as they aren't really wingers. I'll also omit Diallo and Pellestri since they haven't played enough in my opinion.
Boy what a sad list that is!

Considering everything (top level, average level, price and output) I end up with something like this:
(Good)
1. Rashford
(Acceptable)
2. Martial
3. Mata
(cnut tier)
4. Greenwood (goddammit, he would probably at least be 2nd by now if he wasn't who he is)
5. Di Maria (dickhead)
(Meh, jury still out)
6. Garnacho
(Not good enough but could be useful sometimes)
7. Lingard
8. James
9. Januzaj
(So shit that I refuse to rank them)
- Memphis
- Mkhitaryan
- Alexis
- Sancho
- Antony