It sounds like Schwartz is the real deal - hopefully football fans in SH and elsewhere recognize his skill and contribution.
However, a person must be careful when placing value on number of tackles.
The leading tackler on a defense that just can't get off the field will have considerably better stats than the leading tackler on a team that forces a lot of 3 and out possessions upon their opponents. Some defenders are on the field for 60+ snaps/game, while others could be limited to fewer than 30 (e.g., ML starters in most games this season).
And some schools are apparently quite liberal in awarding tackle assists, while others kind of rarely award anyone but the defender who makes initial contact.
And yes I know I'm simply stating the obvious here.