The top 3 is pretty obvious.
1. Vingegaard
2. Pogacar
3. Roglic
Then there is a gap and a lot comes down to how you rate stability vs peak and it's very close because we have a lot of riders that have done 1 great GT results (podium) in the last two years. Thomas is the only one that has done 2 very good ones, so I'll put him 4th.
4. Thomas
Then Remco, Hindley, Yates-brothers, Kuss, Ayoso, Mas, Almeida, Landa, Carapaz etc kind of have to be judged mostely about the quality of their best performance / potential in the non-podium GTs. So I'm coming up with this:
5. Remco
6. A. Yates
7. Hindley
8. Kuss
9. Mas
10. Ayoso
11. Almeida
12. S.Yates
13. Landa
14. Carapaz
15. C.Rodriguez/Gaudu