Paul Julian (June 25, 1914 – September 5, 1995) was an American background animator, sound effects artist and voice actor for Warner Bros. Cartoons. He worked on Looney Tunes short films, primarily on director Friz Freleng's Sylvester and Tweety Bird shorts. During his time at Warner, Julian provided the vocal effects of the Road Runner.
[biography (excerpted) from Wikipedia]
The Looney Tunes Hall of Fame
The Roadrunner (voice)
Gee Whiz-z-z-z-z-z-z
Road Runner
Fast and Furry-ous
Road Runner (voice)
To Beep or Not to Beep
Road Runner
Adventures of the Road-Runner
Road Runner (voice)
Superior Duck
Road Runner (voice) (archive sound) (uncredited)
Hook, Line and Stinker
Road Runner
Ready.. Set.. Zoom!
Road Runner (voice) (uncredited)
Going! Going! Gosh!
Road Runner
Zipping Along
Road Runner (voice)
Stop! Look! and Hasten!
Road Runner
Guided Muscle
Road Runner (voice)
There They Go-Go-Go!
Road Runner (voice)
Zoom and Bored
Road Runner (voice)
Scrambled Aches
Road Runner (voice)
Whoa, Be-Gone!
Road Runner (voice)
The Wild Chase
Road Runner (voice)
Beep, Beep
Road Runner (voice)
Fastest with the Mostest
Road Runner (archive sound) (uncredited)
Hopalong Casualty
Road Runner (voice) (uncredited)
Zip 'n Snort
Road Runner (voice) (uncredited)
The Whizzard of Ow
Road Runner (voice) (archive footage)
Tiny Toon Adventures: How I Spent My Vacation
Road Runner (archive sound) (uncredited)
Flash in the Pain
Road Runner (voice) (archive footage)
The Bugs Bunny/Road Runner Movie
Road Runner (voice)
Hare-Breadth Hurry
Bugs Bunny imitating the Road Runner (voice)