In classics, the answer is clear. Remco.
For stage races, I believe Remco is still the number one but this will probably change in 5 months. Remco doesn't have in him another GT win. The question is: Does anyone else have in Bora the ability to win a GT? I don't think so.
Remco when he's present.
The the others (Lipo, Giulio, Papi Rogla).
Still wondering about Lipovitz tho...strange schedule.
And Jay I don't feel like he deserves the support of such a great team so nay.
It's clear that Remco and leadership are inseperable. I read that he even impacts the morale of the classics team. Regarding his actual GC-leadership in one-week races or GTs: I think that depends a lot on his shape and position in the GC. A true leader focusses on the team result. He has done this in the past.