I think Scott's suggestion of Bob Carver is excellent.
The best I can come up with beyond that is Sony. Yes, I'm sure you are laughing now, but CD and SACD, was brought to us by them (and, Philips, of course). Whatever we think about MiniDisc and BluRay, they are not afraid to be on the cutting edge. Of course, you can riddle my suggestion ala their motives (profit, market share, dominance, etc.) for all of this; then again, I don't know too many businesses that have losing money as a goal.
I'll give honorable mentions to AtmaSphere and Magnplanar, although both of those products are mature enough that they kind of lose a bit of this description.
Sadly, most of the innovators in this industry come from another generation - AR, Williamson, Marantz, McIntosh, Apogee, Quad, and on and on...