I lurvs me some multi-part harmony and have an abiding appreciation for good a Capella groups, especially those who can effectively stretch into non-traditional genres (for a Cappella). One group, Voice Play, has a bass that I hadn't heard of until I stumbled across their channel on YouTube. His name is Geoff Castelluci and, man, can he
dig. Makes hitting E1 look easy as pouring a glass of water, and he can do it with solid pitch at volume levels higher than a whisper. Even more impressive is his range ... almost four full octaves from subharmonic to highest chest note, five octaves when you throw in falsetto.
Oogie Boogie's Song (VoicePlay cover)
https://www.youtube.com/watch?v=EbxkOntz2SAThe Headless Horseman (Geoff Castelluci cover)
https://www.youtube.com/watch?v=8rrg0ksSQdwOf course there's other current standouts like Avi Kaplan, Tim Foust, and Tim Storms. I would also be remiss if I didn't give a well-earned nod to icons like J. D. Sumner, George Younce, Ken Turner, and countless others from groups in the 50's, 60s, and 70s that never got the recognition they so rightfully deserved.
Brad