I agree with you, that recruiters are only as good as what they are selling (meaning, whoever we hire, the on-field success will still matter), but, with candidates like Hankerson, Williams, and Galloway, you can also sell their track record with players.
All 3 have developed all-conference WRs, regardless of the offensive system. All 3 have worked, privately, with professional WRs. Williams works privately with two elite NFL WRs (Tyreke Hill and Davante Adams). If I was CMC, and, lets say, Williams is his choice, the first thing I'd have Williams do is contact all his pros and have them 'send love' to Jeremiah Smith. Today, we can't sell any recruit on what our team will do next fall. They heard the same sh*t last fall. But, if you have a coach, with a proven record of success, that's a huge start.
Hankerson and Galloway could easily do the same. Galloway has a WR, Josh Downs, who's probably going to end up a day 2 pick.
Hartline has a proven track record of success. All his WRs get drafted. Truthfully, he's stealing a bit of credit from Zac Smith but whatever. His results get recruits attention!
I just mentioned 4 WR coaches (Hartline, Hankerson, Galloway, and Williams) who have worked with pros, have developed top WRs, have resumes that will get any HS WRs attention.
Kevin Beard doesn't have the experience/resume of the 4 listed above. I just don't know if he's that guy, yet.