At this point, Brian Roberts is the only one who would be in the debate about best UD player of all-time. He's a clear choice for Player of the Decade.
Chris Wright still has a season and a half, which should be his best season and a half, to make his case. But those won't be in this decade. KW was great but unless you're giving bonus points for style (his hardworking, blue-collar reputation) I don't see an argument for choosing him over Roberts.
If you'd like to change this to Recruit of the Decade, Chris Wright wins. Even if he never reaches his NBA potential he has already changed the recruiting level here, and that impact is greater than Roberts on-court contributions.
