Question: Dave King and Jimmie Ross, share which mutual occupation?

Context paragraphs:
Dave King (Irish singer): Dave King (born 11 December 1961) is an Irish vocalist, primary writer and lyricist for the band Flogging Molly.  He was previously well known as the lead singer for the 1980s hard rock band Fastway.

Dave King (novelist): Dave King is a novelist and poet who lives in Brooklyn, in New York City.  He was born in 1955 in Meriden, Connecticut.  His father, Henry T. King, was a U.S. prosecutor at the Nuremberg Trials.

Mutual Broadcasting System: The Mutual Broadcasting System (commonly referred to simply as Mutual; sometimes referred to as MBS, Mutual Radio or the Mutual Radio Network; corporate name Mutual Broadcasting System, Inc.) was an American radio network in operation from 1934 to 1999.  In the golden age of U.S. radio drama, Mutual was best known as the original network home of "The Lone Ranger" and "The Adventures of Superman" and as the long-time radio residence of "The Shadow".  For many years, it was a national broadcaster for Major League Baseball (including the All-Star Game and World Series), the National Football League, and Notre Dame football.  From the mid-1930s and until the demise of the network, Mutual ran a highly respected news service accompanied by a variety of popular commentary shows.  During the 1970s, Mutual pioneered the nationwide late night call-in radio show and introduced the country to Larry King.

Anthony Cox (musician): Anthony Cox (born October 24, 1954) is an American jazz bass player.  He is known for his work with several leading musicians including Geri Allen, Dewey Redman, Dave Douglas, John Scofield, Pat Metheny, Gary Thomas, Marty Ehrlich, Ed Blackwell, Joe Lovano, and Dave King.  He plays mainly in the post-bop, avant-garde, and traditional styles, though he is "versatile enough to work in any style effectively."

Full Circle (Jimmie Ross album): Full Circle is the debut album of Pittsburgh rock/pop musician Jimmie Ross, best known as a member of the Jaggerz.  The album, released in 2010, contains the best of his songs from the Jaggerz.

Junk Magic: Junk Magic is an album by Craig Taborn, with Aaron Stewart (tenor sax), Mat Maneri (viola), and Dave King (drums).  It was released in 2004 by Thirsty Ear Recordings.

Daylight Ghosts: Daylight Ghosts is an album by Craig Taborn, with Chris Speed (tenor saxophone, clarinet), Chris Lightcap (double bass, bass guitar), and Dave King (drums, percussion).

King of the Royal Mounted: King of the Royal Mounted is an American comic book series created in 1935 by Stephen Slesinger, based on popular Western writer Zane Grey's byline and marketed as "Zane Grey's King of the Royal Mounted".  The series' protagonist is Dave King, a Canadian Mountie who always gets his man and who, over the course of the series, is promoted from Corporal to Sergeant.  King has appeared in newspaper strips, comics, Big Little Books, and other ancillary items.

Jimmie Ross: Jimmie Ross is an American rock guitarist and vocalist who is best known for being a member of Pittsburgh band the Jaggerz, known for their 1970 hit "The Rapper".  During the band's initial existence of 1965-1976, the bassist shared the duties of lead vocalist with guitarist Donnie Iris.  By the time the Jaggerz regrouped in 1989, Iris was well into his solo career, and Ross became the sole lead vocalist and remained bassist.  He continues to hold both positions today.

King of the Mounties: King of the Mounties is a 1942 Republic 12-chapter film serial, directed by William Witney.  Allan Lane played Sgt. Dave King of the Mounties, with Peggy Drake as heroine Carol Brent, and Abner Biberman played the villainous Japanese admiral Yamata.

Supporting paragraphs: Dave King (Irish singer) Jimmie Ross
Answer: vocalist