My favorite fictional detective hands down is Rex Stout's Nero Wolfe. The fat, orchid loving gourmand used the incredible mind of his author to solve murders for decades from his 35th Street New York brownstone.
I caught a Nero Wolfe radio show from the early 1950's recently on Sirius. Sydney Greenstreet did a marvelous job as the porcine sleuth.
I buy early Nero Wolfe paperbacks when they are cheap at the Bottom Shelf and reread them. Now I have a big pile to give away. If you live close by and would like to take them for nothing and have a good read, step right up.
As Archie Goodwin once said, this is as straight as ace, king, queen, jack, ten. Don't make me take them back to the Bottom Shelf.