The Genetic Apex Primeape is actually incredibly strong, which is why the Mythical Island Primeape is so strange
Unexplained Abses lets you deal with the biggest problem from each player and very likely turning their next relevant draw into something they lose access to
Obzedat, Ghost Council Obzedat, Ghost Council is an all-time classic Orzhov commander thats unfortunately fallen behind in recent years due to, well, better cards being printed
Atraxa is a really great commander to experiment with because her ability and color identity mean you can explore about six different themes
It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, and so on
The decision of when to play him is complicated, and I'd rather a beginner start with a commander that is always good to have on the field