You could argue for Greg Herceg (RS) and Jarrod Kelso (MH). Really you could make a case for a lot of those positions. The only ones that I think will be unanimous are Kehoe and Holt. And maybe Cash. In 2 years Parker Mikesh will be the best L for sure.
No Panthers? Craig Wessles has to be on there as a setter. The only one I'm taking over him is Kehoe. I'd also have Matt Harpenau as one of the middles assuming there were 3-4.
As mentioned, Elder hasn't had many of the superstar players in recent years. Mike Wauligman is probably Elder's best ever player, and likely in the top 5 of best Ohio players ever but graduated in around 2000 (?), so not many on this site, myself included got to see him play.
Then you have Wessels, Bertke, Harpenau, Neiheisel, Nortmann, Luebbe brothers, Herdemann and I'm sure I'm missing many others who were all VERY good players and some of the best for their age groups but not necessarily names I would have at the top of my list for this topic