Ralph Gunderman, the amiable voice artist and actor who spent more than a decade as the announcer on NBC’s Dateline while contributing to comedy bits on Late Show With David Letterman, has died. He was 77. Gunderman died March 1 at Lenox Hill Hospital in New York of complications from pneumonia, a family spokesperson announced. The Cleveland native moved to New York in 1981 and worked as a freelance national voice-over artist until his retirement in 2021, heard on thousands of commercials, promos and narrations over those four decades. On CBS’ Late Show, Gunderman often provided the voice for fake “announcements” and “commercials” during Letterman’s monologues as a member of a small band of actors that included Sara Krieger, Sam Fried, Robb Webb and J.R. Horne. He also could be heard on films (2003’s Red Betsy), animated TV series (Our Cartoon President) and video games (Star Wars: The Old Republic). The fourth of seven children, Gunderman was born in Cleveland on Sept. 6, 1948. He developed a love for radio and performing while working in …