Ok, coming back with more. I don't think I saw these listed so far (might be one or two duplicates).
I have so many to list here, I am not going to put summaries of them.
My main criteria for liking a podcast are that the voice of the narrator does not hurt my ears, and the case(s) they cover are interesting. I am ok with beginner podcasts where the production is not fancy as long as the case is good. The list below meet my criteria.
These are all single case poscasts:
The Lady Vanishes
Case Closed
Faded out - season 1 and 2 focus on two different cases
Death in Ice Valley
Gangster Capitalism
The Ballad of Billy Balls
Dear Franklin Jones
Shattered
Problem Child
Root of Evil
Maddie
Route 29 Stalker
Bomber
The Teacher's Pet
13: The Search for Leigh Occi
- podcast continues with new title: 13:2 Down in Mississippi
The Drop Out
Without Warning
Secrets True Crime
Unconcluded
Multiple Case Podcasts:
Locations Unknown
Survival
Mysteriously Missing
Unfound