"The Man of a Thousand Voices" 

I took the liberty of editing the following statement:

"Little has long been known as a top impersonator of famous people throughout the world, which has earned him the nickname "The Man of a Thousand Voices," a name which notable voice actor Mel Blanc once held."

Besides the grammar errors (a title is not a "name" or a "nickname"), the latter half of the sentence is not an objective statement  it makes it sound like Little and Blanc faced off in a bid for the title and Blanc lost. That's simply foolish and inaccurate.

Blanc was the first to be given this title and he will forever be "The Man of a Thousand Voices". Little would more accurately be "The Man of a Thousand Impressions", but Blanc's title has been used to refer to Little also by less-informed individuals (primarily media reporters unfamiliar with Blanc or his huge volume of work and repertoire that frankly make Little's look like a dwarf by comparison).

I changed the statement so it reads more objectively:

"Little has long been known as a top impersonator of famous people throughout the world, which has resulted in him being refered to as "The Man of a Thousand Voices" (a title also associated with voice actor Mel Blanc).

  Voiceroy