Which artist or group had the most US Top 40 hits without ever reaching number one?

James Brown holds the record for most Hot 100 entries without a number one song.
https://en.wikipedia.org/wiki/List_of_Hot_100_%28U.S.%29_chart_achievements_and_trivia

Two artists have had 19 Top 40 hits without managing to reach the Top 10.
· AC/DC's nearest miss was in 1988 when "Heatseeker" made no. 12.
· The Super Furry Animal's best effort was "Northern Lites"; no. 11 in 1999 (as of Sep 2005).
http://www.everyhit.com/record2.html

Creedence Clearwater Revival holds the record for the most number two hits (5) without ever hitting number one.
https://en.wikipedia.org/wiki/List_of_Hot_100_(U.S.)_chart_achievements_and_trivia

Found it, it's ELO
http://www.jefflynnesongs.com/elousasingles/