If last time’s anything to go by Schumacher should be #1. Even with their bias towards British drivers (and Senna).
As for the 4 current F1 drivers that are on the list I think it’s Schuey, Alonso, Vettel and Hamilton. Rather shocked to see Brabham and Hill so far down, just like everyone else, but I don’t think that should mean that Vettel and Hamilton don’t deserve their spots in the top 20. But who are the 2 in #22 and #23? Kimi and Jenson? Seriously, I can’t think of many others that would fit…
EDIT: Looking at the intro I’d say it’s fairly clear that Vettel’s on the list.
One thing that people seem to forget is that the standard in F1 drivers is at its highest today. Alonso himself seems to agree – today’s grid is, overall, probably the strongest grid F1 has ever seen. If Seb or ‘nando were to compete in F1 in, say, the ’70s, chances are they’d have even more titles than they do now.
The fact that they have 2 titles each says a lot about them. And we can’t forget about Hammy, Kimi or Jenson! Hell, Massa would deserve some recognition as well.