
Quick answer — Junpei Takiguchi voices Phyllo in .hack//Roots, Trelawny in Treasure Island, Sennen Hakushaku in D.Gray-man and 6 more characters.
Junpei Takiguchi voices Phyllo (.hack//Roots), Trelawny (Treasure Island), Sennen Hakushaku (D.Gray-man), Mister X (Lupin the 3rd Part 2), Phantoma Mark III (Lupin the 3rd Part 2), Makeru Butamo (Metropolis), Wilson Phillips (JoJo's Bizarre Adventure), Seiichi (Doubutsu no Mori) and 1 more.
Phyllo is voiced in Japanese by Junpei Takiguchi.