There are many promising lower-series racers who have never graduated into F1 that did come close, and there are young drivers currently dominating their own series that I would eventually like to see make it into F1.
I think Neel Jani, who has been F1 testing since 2002, and Alvaro Parente, ex-Virgin reserve, do deserve an F1 drive due to their performances in each of the series they raced in. I would also like to see Filippi, who had solid performances in AutoGP and GP2, along woth testing with Honda, should get a drive, along with Paffet and di Resta. These pilots are all ready for F1 in my opinion.
In the other subcategory of this topic, which is young drivers doing well in lower tier series but not ready for F1 like the ones mentioned above are Yuji Kunimoto, Jean Eric Vergne, Daniel Ricciardo, Mikhail Aleshin, Kazim Howeveryouspellhislastnamebecauseidontknow, and Esteban Gutierrez. I know for sure Maldonado will get a drive in F1 for 2011, and so might Perez.