I'd have to measure and see if it is tall enough, but I have a BIG over-the-shoulder Tamrac bag that can fit 2 FF DSLRs/ film SLRs, 4-6 lenses and a pair of full-size speedlights. If you pull out all the dividers and re-configure, it should be able to handle what you're looking to put in it.

if this isn't the exact bag, it's pretty darned close: