Since no one else seems to mention Darryl Clark....here are some stats:
He is all time leader in Touchdowns (43)
Season TD's (24)
Season passing yards (3003)
Career TD's responsible for (65)
He was 22-4 as a starter. his only losses were to Iowa (twice), Ohio state, and USC in Rose Bowl (2009)
He is unarguably top 10 and realistically top 5.
I thought mcGloin passed him in 2012 with 3271 yds (which I think Hack cracks this year). and Matty Moxie also had 24 TDs that season.
of course Darryl Clark played during those dismal "Paterno lost his edge" (06-09) years when PSU went 40-12 and had the second best record in the Big Ten. And should have played for a title in 2008 (Clark threw only his 3rd INT of the year to set up Iowa's GW FG!!!)