These all sound great. I've loved mysteries for decades. A few classics belong on your list, even though the authors are no longer with us. All are top notch for danger, arcane knowledge, characterization, philosophical insights, and well-crafted mystery.

Joe Leaphorn of the Navajo Tribal Police, created by Tony Hillerman.

Travis McGee, a Florida beach bum/salvage expert/fighter/lover/philosopher created by John D. MacDonald.

Brother Cadfael, retired mercenary and herbalist for the Abbey of St. Peter and St. Paul on the border of England and Wales in the 11th Century, created by Ellis Peters.

Lord Peter Wimsey, a gentleman detective in England between WWI and WWII, created by Dorothy Sayers.

And if you REALLY want to go classic, read the novel that invented the detective genre, The Moonstone by Wilkie Collins.