Gary Cooper's 4 syllables (2 + 2) hit the Hollywood sweet spot.
Gary's 2 beats vs. Cooper's 2 create a natural cinematic snap.
Gary Cooper blends hard and soft consonants — decent presence, some softness.
Gary Cooper misses the alliteration hook that makes names stick.
Gary (4 letters) and Cooper (6) are balanced in length — clean on any poster or marquee.
Gary Cooper has mostly familiar phonemes with a few tricky patterns.
Gary Cooper's open vowels roll off the tongue — warm and screen-ready.