Johnny O's warmups were, I've read, a sight to behold. He would come out with a banshee yell and do such things as sit on the laps of women in the audience. He once said about "Price": "When I say BOB BARKER, man, that does it for me."
Three other names come to mind: Kenny Williams, the voice of most Heatter-Quigley shows (among them "Video Village," "Hollywood Squares," "Gambit," and "High Rollers"); Jay Stewart (Monty Hall's sidekick on the original "Let's Make A Deal," announcer on "Sale Of The Century" from 1983 until his death in 1988, and sometime voice on Barry and Enright shows); and Ed McMahon ("Two For The Money" when Sam Levenson hosted in 1957, then the beginning of his long association with Johnny Carson when he was hired to replace Bill Nimmo on "Who Do You Trust?" in 1958--Nimmo returned as Woody Woodbury's announcer in 1962 when Carson and McMahon left for "The Tonight Show"). BTW, Williams was the announcer on "Two For The Money" in the Herb Shriner era (1952-56) while Dennis James did the Old Gold commercials.
And since someone mentioned Hal Simms, I'll mention another soap announcer, Mel Brandt ("The Doctors") who announced "GE College Bowl" on NBC (1963-70)--remember his opening: "Match wits with the champions in America's favorite question and answer game, live from New York, the General Electric College Bowl."
Likewise, one of his predecessors at CBS was also a soap announcer, Allan Berns ("Guiding Light").