oftheherd
Veteran
...
All makers made good SLRs and lenses. You'll hear all kinds of recommendations, just like in all the other threads of this sort. As you have the OM-1, the first thing I'd do is check if you need a correction eyepiece to make focusing as easy as possible, get the lenses cleaned, and keep them dry in the future.
Indeed, most of the major manufactures at one time or another made good cameras and lenses. Their cameras and lenses were well supported and lasted a long time between trips for CLAs.
I started out in 35mm cameradom with a Yashica TL Super, which was an M42 mount. It was a pretty good camera for its price. Having some lenses to use on it, when I decided I wanted auto exposure, the Fujica ST 901 was an easy choice.
That camera was never considered a pro camera despite some of the best lenses available. So it was never popular. I mean, M42 mount instead of bayonet mount? As time has gone by, the used Fujinon lenses suddenly increased in desirability and therefore cost.
It may not have been worth a hoot to most others, but it was perfect for me. Especially for crime scene photography. I still have it and the lenses that I had back in the 70s and 80s. That's the kind of camera you want: not the Fujica, but what is perfect for you.
Many of the other systems mentioned here would be good for a lot of people. The choice must only be yours. But it is good to question and consider the answers. It will help you make you choices good ones for you.
And we all get a chance to add to our camera knowledge. 🙂