Longsnap.com has been compiling tackles by long snappers in punt coverage since 2000, when the site was launched. Although not necessarily the best indicator of a snapper’s ability, the recording of tackles in one of the few objective statistics for a snapper.
The NFL Long Snappers page has been updated to include the punt tackle statistic leaders for each season from 2000 to the present and can be found here:
Longsnap.com 