If you go removable instead of folding, get a holder that retains the pedal to the bike when it's uncoupled from the crank arm.

Going MKS, go with the EZY Superior rather than the Ezy.

I'm seeing some removable RockBros pedals on eBay. Now you know as much about those as I do.

Perhaps Wellgo B257 Quick Release II?

The Brompton folding pedals are kinda cool, 'cause they fold up a lot tighter than most other folding pedals. The right one is rare and pricey. They're better with an attached Bromfoot. They don't fit on most modern cranks, though.