The bassest voice on radio
You rarely hear REAL bass voices today. Some bass-like voices (eg Henry Kissinger) are actually glottal fry or 'chopper' notes, without a bass resonance.
One nice exception is radio reporter James Shimanyula, often heard on
Channel Africa, a service of RSA. True bass, with the same range and resonance as the pedal register on a big church organ.
I can't find any specific clips of Shimanyula online, but if you listen to the Channel Africa podcasts you'll catch him quickly. No chance of missing his segments: your walls and floors and windows will let you know.