I’ve used Jamstix for Hammond organ trio practice. I don’t know how much time and learning effort are needed for the other drum apps/VST’s recommended, Jamstix is actually a very sophisticated drum “brain” that the developer has been working on a long time.
When I first started using it the drumming was much busier than I anticipated and sometimes somewhat wild. Once I learned to tame it down I’ve been getting good results.
If you ever decide on Jamstix go to the forum and post a video link to what you’re trying to achieve with it and the developer, Ray, and several other active forum members will help you.
What’s good about Jamstix is the drumming isn’t static, the Jamstix “player” will do things slightly differently (if you don’t lock the part down) each play through but not randomly, it’s things an actual drummer would do. In fact you assign drummer styles through choosing the player, Gavin, for example and that “player” will tend to play in the style that drummer is know for.
Here’s an older thread post I wrote about Jamstix: Using Jamstix 4 with Cantabile3