Matt Parkman in Heroes was a cop.
Sleepy Hollow. Even less cop show elements than Grimm since it’s not using the crime scene to drive the supernatural investigation of the week.
No way Chief Wiggum is a main character. He’s a recurring character, but his absence from any given episode requires neither explanation nor comment. Though the show’s pretty much become about the city of Springfield as a whole, the main characters are still just the Homer, Marge, Bart, and Lisa, one of whom is always linked to an episode’s main plot.
so was Homer.
Some current shows that may fit:
Once Upon A Time - the main character, Emma, has taken over the role of sheriff in Storybrooke.
The Leftovers - HBO series about the sudden unexplainable disappearance of millions of people worldwide. The main character is a Chief of Police in his hometown.
Gotham - maybe this could be called a “cop show,” but it’s not your typical procedural. Detective Jim Gordon is the center of the show.
Arrow and The Flash - both of these shows have regular supporting characters who are cops (Detective Lance on Arrow and Detective West on The Flash).
Defiance - Syfy show, the main character is the “law keeper” (basically the sheriff) of the town built on the ruins of St. Louis.
Continuum - scifi/time-travel show, the lead character was a kind of cop in the future, and she partners up with a Vancouver cop in our present.
Lost Girl - fantasy show, one of the main supporting characters is Dyson, a werewolf who is a cop.
And for a non-scifi/fantasy offering:
Orange is the New Black - a few of the characters are prison guards.
The John Larroquette Show ran for 3 season in the mid-90s. Lenny Clarke and Elizabeth Berridge played cops that were part of the main cast.
I honestly think that the only ones that fit the bill are Family Matters, Mike & Molly, and Everybody Loves Raymond
FM and MM for sure, for Ray, I think that his brother was such an integral part of the show (having either the A or B story in virtually every episode) brings him out of the recurring character role and into the main cast.
Anyone else is just a recurring character (Wiggum) or the fact that they’re a cop is only part and parcel to a more intricate story (Once, Grimm, Walking Dead, etc.)
On The New Girl, one of the main characters, Winston, is in the process of becoming a cop. He’s been doing training and recently took some sort of an exam.
I can’t imagine how Family Matters would count and Gimme a Break wouldn’t. Although the show went on after the actor’s death, for the first four seasons he was a main character.
Old: Greatest American Hero
New: The first episode of Orphan Black. Well, the first five minutes or so, anyway.
Given that both of the main characters were cops, and all the episodes were about cop stuff…
Grimm is a cop show. It is a cop show with a twist but many episodes are cop show plots with the bad guy being a monster.
After the 1st episode The Walking Dead is about an ex-cop. There is no longer any civilization to be a cop in.
What about Commissioner Gordon on Batman?
I’ve never heard of Gimmie a Break before, so that’s why I didn’t include it.
And omission out of ignorance more than anything else
Car 54 Where Are You - pretty much all the characters were cops (or their wives), and it was rarely about a crime. Almost always about their personal lives.
Barney Miller also had little in the way of actual crime fighting.
The TV Show Doc, is about a doctor whose best friend is a cop.
Sherlock has Inspector Lestrade as an important character.
If those shows count, the Flash’s day job as a crime-scene investigator deserves mention.
Definitely main cast. Robert wasn’t just a recurring character. Brad Garrett had equal billing with the others in the opening credits.
True, but he’s not investigating crimes towards a standard cop resolution… it’s not like his enemies go to court. He’s running about 50/50 between incarcerated in his private prison and dead.
Kelso was a cop for a while on that 70’s show