Slim Whitaker's 4 syllables (1 + 3) hit the Hollywood sweet spot.
Slim and Whitaker have a workable rhythm — close to the perfect punch.
Slim Whitaker's softer consonants cost it screen presence.
Slim Whitaker misses the alliteration hook that makes names stick.
Slim (4 letters) and Whitaker (8) have a slight length mismatch, but it reads fine on screen.
Slim Whitaker has mostly familiar phonemes with a few tricky patterns.
Slim Whitaker has decent vowel richness, but stronger A and O sounds would lift it.