The PERFECT English Voice Actor for Emperor Idola Eldercapt is:
www.youtube.com/watch?v=DehbC0… - Dat VOICE!
www.youtube.com/watch?v=4yzPl5… - Pure RAGE!
www.youtube.com/watch?v=Pa28wi… - Like SILK!

If'so'ever Royal Shakespeare Company trained actor of ilke!

_{Sadly-In-Sooth, Tetsuya Nomura will choose someone not  so  amain...}

As for tother;
images1.wikia.nocookie.net/__c…
It's either thee Anthony Hopkins/David Warner/Michael Gambon/Terence Stamp/Ian Mckellen!!!

Begone Thy Dreams.

(I honestly believe he might be the one, because;
www.enixorigin.com/final-fanta…

UPDATE: And I Believe it MIGHT BE HIM!; www.youtube.com/watch?v=EJ2Kwy…
Emperor Idola's debut ENG'voice can be heard at 0:39-0:42.