I too wish I had a more aggressive rasp. Mine is pretty aggressive comparatively, but I doubt there is anything that is as aggressive as I want. Maybe I will just have to keep experimenting. I would like a tool that removes wood somewhere between a band saw and a cabinet scraper. I've tried a couple of things: Drawknife, Rasp, Spokeshave, cabinet scraper. The draw knife is the best if you learn how to control it, but it is practically unusable if you have to remove wood around a knot in an even fashion. Maybe if I had a shave horse I could learn to do it, but I'm restricted in the direction of travel that I can pull the blade. The Rasp is about as fast as the scraper but less fatiguing. I've tried the spokeshave but haven't had much success with it. It has the same problems as the draw knife, but I did just get it and it probably needs to be sharpened.
I still want to try a Shinto rasp, and good surform and see how they compare. I also want to try a large sharp hand plane and see how that does. I would also contest that not all rasps of the same type are created equal. I bought a "very coarse" Nicholson rasp from my local woodwork store, but it was worse than the "medium-coarse" one I had of another brand. I still would like to try the Nicholson cabinet rasp #49 but don't have the money for it now. If you have a Very aggressive rasp I would encourage you to post the type, brand, and model number so we can share in your find.