So to report back:
Banshee I rode front seat. Needed to pull the black flat chest harness out a bit, but it fit with some finesse.
Diamondback rode front seat. Needed a push to get it locked down, but it wasn't hard to achieve.
Bat rode front seat. I could have been 50lbs heavier and still rode.
Going back in the AM to attempt beast, Vortex, etc. Spoke with guest relations though and they told me that Diamondback is the ride to use to gauge. The guy said that if you can ride that, you can ride anything in the park as that is the most restrictive. I was figuring The Beast was more restrictive but we will see tomorrow.