Dodd was also a bona fide recording artist, and one of his songs was even one of the best-sellers of all time.
Tears, released in August 1965, was a Number One smash hit, and went on to spend five weeks at the summit.
It sold over a million copies in the UK, and was the third biggest-seller of the 1960s – the only non-Beatles song in the Top 5.
In 2002, it was also credited as being one of the best-selling records of all time in this country.
Ken Dodd has died at the age of 90
Dodd was a British showbiz legend
The Official Charts Company lists it at No38 in the all-time chart – above such iconic songs as Wonderwall by Oasis, YMCA by Village People and careless Whisper by George Michael.
It was his best-selling single by a long way, but not his only successful song.
Dodd started his music career in 1960 with Love Is Like A Violin, which peaked at No8 in the UK.
He scored several other Top 40 entries before Tears; after which he went on to achieve Top 10 success again with The River and Promises.
Tributes have come rolling in for the performer
His final single, Hold My Hand, peaked at No44 in 1981.
Dara O Briain tweeted: “Ah, Ken Dodd has died. So happy I got to meet him once, and more importantly, saw him do one of his incredible 5 hour shows.
“He was an education to watch and, afterwards, at 1.30 am, he had beers with me in the dressing room and talked showbiz. A privilege, and a loss. RIP.”
Claire Sweeney wrote: “RIP Sir Ken Dodd. A legend and an inspiration. I have a lot to thank You for.
“I Was thrilled you had the best birthday party in Liverpool before you left us. Your city, friends,Family and Show business will miss you terribly.”
Liverpool Mayor Joe Anderson said a book of condolence will be open later today.