I LOVE the Gregor Demarkian books!

Have you read the John Putnam Thatcher series by Emma Lathen? It's old but great and fits your criteria: senior VP of a large bank on Wall Street in New York. Great characters, next to no violence or gore.

Even older is the Merton Heimrich series by Richard and Frances Lockridge. He's with the New York State Police in upstate NY.

What about Lawrence Block? The Bernie Rhodenbarr books are lighter than the Matt Scudder titles, which you may find are too dark.

I have a friend who loves the Joe Gunther books by Archer Mayor, but I haven't been able to get interested in them.

 I also like the John Thinnes/Jack Caleb series set in Chicago. Unfortunately there are only 5 of them.

Check out Stephen Booth's Ben Cooper series or Val McDermid's Tony Hill series.  Both of these are gritty British series.  If you want something that is a little different  try C. J. Box's Joe Pickett series.

Oh.  You might like Ken Bruen too.  Irish.  Good stuff.  Also Michael McGarrity's Kevin Kerney series and Steve Hamilton's Alex McKnight series.

How could I forget Charles Todd?  His (their, actually, as it's a mother/son team) Ian Rutledge series set in England after WWI is terrific.

Try Robert Crais' Elvis Cole/Joe Pike series. It is set in Los Angeles--12 in the series thus far.

How about the older Lovejoy series by Jonathan Gash?  Or my favorite, the Bryant & May mysteries by Christopher Fowler?  Or John Dunning's bookman series?

One of the many things I liked about the John Putnam Thatcher series is that each title focuses on a particular industry and somehow one or two people within that industry become important to the story, which shows the impact of the industry on everyday ordinary people.

Emma Lathen is pseudonym of two American businesswomen: an economist Mary Jane Latsis and an economic analyst Martha Henissart, the business slant is unusual compared to the current trend in craft-related cozies.

I hope you enjoy these books.

I liked Gregor and John Putname Thatcher as well as the Prey series.

If you want something light definately try the Bernie Rhodenbarr series by Lawrence Block.

Another author you might try is Jeff Abbott.  He has two series:   Do Unto Others, The Only Good Yankee, Promises of Home and Distant Blood is one and A Kiss Gone Bad, Black Jack Point and Cut and Run is the other.

Another series in Lee Child's Jack Reacher series.  He's a former Marine so the books do have gory spots.  Tough guy rather than a sit back and think about the problem likeGregor.