Very interesting question, for which I suspect I am wholly unable to give any specific advice.
But I love the question and was wondering how you see (hear) what you are triggering - the range of sounds the human vocal apparatus can create is really huge - would you be triggering one sound or trying to trigger a range of sounds?
yes I understand what you mean, the range can be huge, but in my case, I am just want to trigger bass and snare drum, to get the basic rhytm flow structure adding hihats and cymbals is a lot less time consuming job and I can add a drum pad to add that afterwards, the most important part is the bassdrum and snare.
It probably exist hardware boxes that translate sound to midi signals, maybe you can sett a certain frequency range for the bass drum and a higher frequency range for the snare... it should also recognize velocity.
It probably exist plugs that do it...
Would also love more about midi guitar and how to trigger samples like this.