[morini]

I think Saintz is good, but certainly not that good (otherwise the other top teams would of snatched him away in stead of a complex deal with Renault).
So far, I think Vettel is still their best product, but Verstappen will surpass Vettel as a talent next year for sure (results is a different thing). Then there is Ricciardo who I also believe is better then Saintz, with the latter as a number 4 in that program. But that's my personal view.

1. Vettel / Verstappen
2. Verstappen / Vettel
3. Ricciardo
4. Saintz
5. Kvyat
6. Etc.

Interesting perspective. Personally I've never rated Vettel and I'd put him behind Vertsappen, Ricciardio and Sainz in all round driving ability. He has a great WDC track record in a planted car but it has to be on rails for him to get the most out of it (that RB in the blown diffuser era cornered like a scaletrix car, the competition wasn't even close). The very best drivers can maximise a badly balanced car but Vettel can't cope with that. His season against Dan Ricc was actually pretty embarrassing to witness.

My order would be

1. Verstappen
2. Dan Ric / Carlos Sainz
3. Vettel
4. Kvyat (maybe, don't much rate him either to be honest)