@NowYouListenToMeFella, you've got a load of good stuff there!
Sounds like you have everything you need for :-
Body Attack (old school aerobics)
Body Combat (boxercise)
Barre (ballet style - can be done barefoot, only needs light weight plates for some exercises.)
Body Balance (yoga / pilates)
Sh'bam - dance!
Grit (known here as Grot! Hiit training - there are strength and cardio based variations on the torture)
You're mostly there for Body Pump. They use a step as a weights bench on the chest tracks - you can work around this (even just lie on the floor) but it's a better workout with something acting as a bench. And if you get a step for this, you can also use it for Body Step.
You're also mostly there for Core/Cxworx (recently renamed )-. This needs a long exercise band, preferably with handles.
The only thing that would need a big purchase are the spin bike based classes such as the The Trip, RPM.