The former, “The Gray Ghost of Gonzaga”, is pretty well known in Wisconsin, anyway. 
The latter did attend Gonzaga, but isn’t in the Hall of Fame (it looks like he was mostly a reserve back for the Giants and Redskins in the 1930s). I think you may be confusing him with Paul Krause, the HoF safety who played primary for the Vikings – but he went to Iowa.
Danny Ainge was, like Jimmer, the college player of the year, so this would be a toss up.
No. Syracuse was a football power in the 1950s and 60s, sharing a national championship in 1959 and producing top running backs like Brown, Ernie Davis, Floyd Little, and Larry Csonka.
UGA - Dominic Wilkins
University of Kentucky - Art Still
(Tim Couch did not do much in the NFL, but does still hold a lot of SEC passing records.)
Marcus Pollard was a decent tight end for the Colts a few years ago. He went to school at Bradley, which doesn’t even have a football team. He played basketball for them.
Couple more
“The Logo” Jerry West (West Virginia)
Sir Charles (Auburn)
George Blanda, whom I mentioned earlier, is the only Kentucky alumnus in the Pro Fotttball Hall of Fame.