If it were my tank I would add more live rock...unless you are aiming for a reef tank.

Never heard the dead fish theory, I know I always get dead things out before it messes up the water...dead fish decompose and I guess they would start the cycle, but it would be easier to add fish...damsels are cheap/hardy fish. Buy a couple damsels ($5-8 each) and they'll get the cycle started...they'll also be better to look at!