I have always considered the senton bomb to be among the more underrated of jumping-and-landing-on-your-opponent type maneuvers. While there is some give to, say, the underside of a leg or the belly, the lumbar spine is a portion of the body that is rigid and when attached to a somewhat hefty man, I really don't see how it can be performed without genuinely crushing your foe.
Jeff Hardy's senton, in my opinion, sort of deflects the force away from the opponent and for that reason I much prefer Dick Togo's senton where all force is directed straight down onto his victim.