It's Shurna.
Though in terms of most important recruits (of recent history), it's Juice (started the local run with Shurna, Crawford) and Pardon.
Juice set the stage for the back-to-back-to-back-to-back post season appearances (should have been 5, but for injuries), which set the stage for the hiring of CC.
Pardon was the missing piece at the 5 the Cats haven't had in a loving time - an athletic 5 who was a plus presence on D and who could play around the basket with greater efficiency (missed bunnies had long been a bugaboo).
If Cobb had been able to stay healthy, he would've been at the Crawford level.
Hearn is oft undervalued, but for 2 seasons he was pretty good (better than that for 1), so I'd rate him higher than Lindsey.
Only played one season for the Cats, but Swop was pretty darn good at the 4 despite having a lanky build (that team with Swop, Crawford, Hearn, Cobb and a frosh Olah could have been something).