We'd have too much player redundancy between Richie & Toolson. Both are big, strong D1 guards who a good athletes, but neither are game-changing athletes w game-changing speed. Toolson might be able to get to the rim a bit better than Richie, even — but in terms of shooting & overall offense he wouldn't give us what Richie does. And probably not even all that close. In terms of ball-handlers, neither are breaking anyone down off the dribble — & neither are taking the ball up for you, either.
So long as Richie is on our team, I doubt KY would go after Toolson unless he were 2-3 inches taller.
As for Knell or Baker, I doubt KY would even recruit them as scholarship players. Defensively, they're just not Big 12 championship-level athletes.