They’re all awesome and would all work fine.
Personally I’d go for the minilab cos LOOK AT ALL THOSE KNOBS
But I don’t think you’ll have any serious complaints with any of them.
A microfreak would be amazing, seems a little overkill to use as a midi controller
But you get lots of expression and options with it.
You’ll need to watch if you’ve got any specific requirements or preferences. I dislike rotary encoders and short knobs, which rules out both the Minilab and MPK respectively, but that’s just me. And my space is limited so I don’t use the keystep much until I’m actually playing a melody or an arp as it doesn’t have any knobs on it and the smaller keyboards give me more utility.
So watch what applies to your particular brain and go for it.