I didn't actually know this, so I am mostly amused

Vergil has the most obscure VA ever, whose only other role so far as I know is Eric Myers, the Quantum Rangers, from POWER RANGERS

*Ranger

But Sasuke shares with...

(Japanese of course, ignored the English VAs)

Gintama (Takasugi Shinsuke)

Soul Eater (Excalibur)

Hellsing (Luke Valentine)

Tales of the Abyss (Jade Curtiss)

Kingdom Hearts II (Seifer Almasy)

and then he's got some minor roles in Bleach, One Piece and FMA.

Black Star's VA's only other role I recognize is Beat from Eternal Sonata, but apparently has a role in Naruto and Reborn

Justin Law's VA is even more obscure. But I remember the Green Onion boy from Gantz

he's also apparently in the first Naruto Shippuden movie as... Taruho?

/has not seen