While those are not big-name players, I like a few of them.
The two names that stood out the most for me are:
S Christian Uphoff
WR JoJo Natson
Uphoff is a 6-2, 209-pound safety who was a great player at Illinois State. He is excellent in run defense. He is such a great tackler that I'm confident he could play as a hybrid linebacker in the NFL as well. He is only 24 years old. He played with the Green Bay Packers last year and was very solid on special teams.
As for JoJo Natson, he is such an explosive player. He is one of the smallest players in the league, but he is so dangerous with the football in his hands. The man is literally a human joystick at times. While he has not played a lot on offense in the NFL yet, he has been a very productive kick and punt returner and this would add value to a potential signing of him with the Bears.
Here is an example of his quickness in the open field: