Start from my favorite. Gold Saints.

Keanu Reeves as Mu.

In comic Mu is a Tibetan, however Kurumada's setting is always funny. This Tibetan looks total Caucasian : he has blond hair and green eyes.

On animation is purple hair and blue eyes. Still looks closer to Caucasian rather than Asian.

So as an Eurasian (not really much ... he has less than half Asian blood, but still) Keanu Reeves may be a good one for Mu.