4. Jim Harbaugh
We have now entered the "respectable" portion, with Jim Harbaugh coming in at number four on the all-time Bears quarterbacks list. The former Michigan quarterback ranks third all-time in Bears passing yards with 11,567. He threw 50 touchdowns and 56 interceptions during his six seasons in Chicago.
An interesting fact about Harbaugh: His only two double-digit win seasons as a starting quarterback came in Chicago, in back-to-back years (1990 and 1991). In 75 starts, Harbaugh went 35-30 as a Bear. Another tip of the cap to Harbaugh: His 2.8 interception percentage ranks first out of the Bears' top 20 passers of all-time. At the very least, you could say he took care of the football, and that's something Bears fans can appreciate.
Overall, he went on to be a fairly mediocre quarterback as he was in Chicago, but he was still worth keeping around in the NFL. Harbaugh would go on to play four seasons in Indianapolis, one with the Ravens and two with the San Diego Chargers before calling it quits.