You got it

Tim Storms, an American singer and composer, holds the Guinness World Records for lowest note produced by a human and the widest vocal range. Not only has bass-singer Tim Storms smashed the some kind of ‘bass hunter’ competition, but it was announced recent that he’s got the lowest voice in the world.

Yes, he is better then I 

I have only the four octave wide vocal range.
But on the other hand I have no interest to sing notes out of common voice-range: some voices out on the above or below dynamic voice scale.
At spring Tim Storms reclaimed the record for the lowest note produced by a Human. The new record is G-7, or .189Hz (find out: point 189 Hertz). That is 8 octaves below the lowest G on the piano.

When composer Paul Mealor wrote his piece De Profundis, containing the lowest note ever written in a piece of classical music, it prompted an international competition to find a singer capable of performing the work. No one (except a clairhearer) can hear this kind of  the lowest note, but can feel.

His low D of The Abduction from the Seraglio, or O Rapto do Serralho, by Mozart, is good, D is real good. Many great basses, like Martti Talvela, failed to sustain the low D in this aria.
He can try, I suppose, again the low D of  L'Incoronazione di Poppea.
ps.
I made a song about The Boss, in which I will sing below the scale of the guitar.