You really don't know your Apple history. Jobs was kicked off the Lisa program and moved to head the Macintosh program, which was quite successful. He was forced out of the company in 1985, and Apple's dark ages came not long afterwards, to be resurrected after his return.
Lol. The Lisa program almost killed Apple. And of course, it didn’t matter much that Jobs was “kicked off the Lisa”, Lisa was dead as a dornail on arrival :). The save was Mac, which wasn’t Jobs innovation at all, but simply an implementation of a Xerox design. It was still too narrow, and too closed, to really compete against IBM running the old Woz-like openness.
If he supplied something to Apple, it wasn’t innovation. Rather the opposite.