On the last Illini Inquirer podcast Isaac Trotter said according to kenpom his top similarity scores (comparing stats, not style of play) are Jalen Brunson, Ty Jerome, Melo Trimble and Collin Gillespie
I don't think Klay is a very good comp since he's famous for scoring without dribbling. I propose Tyrese Haliburton as the better option. He definitely plays faster than Keaton does now, but check out his college highlights: