I mourn the days when it was nearly impossible to succeed in VC before first excelling as an operator.
Even before the ones I named, Don Lucas was first guy in at Oracle; I don't think he operated much. Ditto Jacqui Morby and Henry McCance in Boston.
And Ben Rosen was a stock analyst, who trained the guy who trained me. He was one of the best VC of all, although he didn't bother doing it for long.