The NCAA record book for volleyball coaching victories is a great source for potential Wizard nominations. Above and beyond those already selected based on AVCA Hall of Fame membership, a whole bunch of top coaches (likely future Hall of Famers) can be added to the list.
The AVCA list includes a few high school coaches. The National High School Coaches Association’s list of annual high school volleyball coach of the year is a good additional source of candidate. Taking things up a big notch, the National Federation of State High School Associations has a record book of coaching victories nationally (though only for girls). Some coaches have achieved crazy big win totals!