actually back in the prequels general greivous had and used like 6 of them. Plus in the old EU there were multiple characters who used them. Also one last example would be Qui Gon in the first episode where he asks how do you know I didnt kill a jedi and take it from him. and the subsequent answer of I wish that were…

No in the now expunged EU book Darth Palagius there were a few jedi including dooku that saw things getting worse and worse. Then palagius planted the seed in his mind about knowing some people who could clone in case something like a civil war happened. which directly lead to him going off and creating the army