I thought of some others, Bruno Junqueira and Sebastian Bourdais from the Champ Car series. Both are doing well this year and at least have some experience on road courses.
I think there is a few drivers in this series that could make it in F1, like Montoya and Da Matta (although he is crap at the moment) have in the past.
Others that I think are capable are Ryan Hunter-Reay (an American), Justin Wilson (already has been in F1) and maybe Paul Tracy although he might be a bit old.
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