Deletion of List of contemporary and crossover bass-baritones

Comment: also entirely |original research, as I see no evidence that there is any way to verify that these are bass-baritone singers.  Also, as noted, the basic premise of the list is insanely broad.  Contemporary= modern and crossover= fits in two musical genres.  This is not a very informative list, based on that criteria
Stance: delete
Cited policy: Wikipedia:No original research (WP:OR)