The only to be original these days is to go with a quickstrike or limited edition shoe. Right now, some Lunar Trainers will likely separate you from the others.
How about some Huarache Free Runs? I got this colorway on the way.
It comes in plenty of colorways too, this grey/light blue is nice.
There is also the Footscape Free? Chances are no one is going to use a pair of this in the gym. Though I think it has the free sole you hate?
If you can find these quickstrike release version then you'd be all alone in the gym with it for sure.
You can also go back old school with the Kukinis?