When looking at stats, it looks like the most talented Bears QB of all time would be Hall of Famer Sid Luckman, who played for the Bears from 1939-1950. He finished his career as a 6-time All-Pro, 4-time NFL champion, 3-time NFL All-Star, and the NFL MVP. However, this was a very different time in football, so it's hard to compare players from his generation to players from the past 30 years.
Many would say that Jay Cutler is the most talented Bears QB of all time, though he was only named to one Pro Bowl. Cutler was a controversial players, where many fans had a strong dislike for him.
I may agree with this, as the question is not the "best" QB, but rather the most "talented" in Bears history.
Fields is a mobile player, who can run, throw, and break several tackles with his strength. He is still a young player who is learning the schemes of the game, but with more time and better coaches, he could end being the best Bears QB of all time if the team sticks with him.
