US actor Finn, who appeared in popular television series including Friends, Seinfeld and The Middle, has succumbed aged 60.
The skilled improv artist succumbed at his home in LA recently after undergoing treatment for a cancer diagnosis beginning in 2022, according to reports.
"He never met a stranger - only friends he hadn't encountered," his relatives stated in a message.
They noted that he had "experienced life to the fullest - with joy and exuberance".
His initial on-screen part was on a show starring George Wendt in the mid-90s, where he portrayed the brother of the main character.
He also had a recurring role on Murphy Brown from 1995 to 1997.
He played the part of the character Joe Mayo in "Seinfeld" in 1998, depicting a party host famous for delegating tedious tasks to his guests.
In the 90s and 2000s, he appeared as a guest star on a variety of hit series, including:
His most famous role for his portrayal of the character Bill Norwood in The Middle, appearing throughout eight seasons between 2011 and 2018.
His cinematic roles include "It's Complicated" and Santa Paws 2: The Santa Pups.
Beyond his on-screen roles, Finn was a skilled improviser and served as an educator at the Colorado university, where he was a professor.
He was part of a comedy group of six known as Beer Shark Mice.
"He taught, supported, and inspired countless students over the years and it's nearly impossible to find someone anyplace who has an unkind word to say about him," his relatives stated.
Paying homage, colleague and actor Richard Kind noted there was "not a more kind, gentle, or funny, down to earth person you could encounter".
"Consistently upbeat, assisting others to improve and be funnier. A great dad, a great guy," Kind wrote publicly.
Finn is leaves behind his spouse Donna, his three kids, and his family.
Mira is a tech journalist and AI researcher with over a decade of experience covering emerging technologies and their societal impacts.