Hey SS
With the width and length you have you could about make anything you wanted, and ya didn't really say what your interests are....(hunting, target, 3-D etc.)
The 3/4" thickness will probably require a small grip riser as I make most of my bows grip 1-1/8" (min.) deep...unless you make a "D" bow that bends through the handle. You have plenty of width for a paddle-bow, more than you need for a nice pyramid style, or maybe 2 bows if you went with a long-thin type bow profiles.
Any of those shapes make good bows....so I guess it would (or should) be what you like, that way ya kinda get the fire in your belly for the project...if it's what you want or like. Any style should work with backed red oak. Just one guys opinion for whatever it might be worth............oh ya you know I like them Mollegabets, eh
half eye