OPS is. Slugging + on-base percentage.
Rose's OPS is pretty low at .784 by HOF standards.
That is partly because he hung on so long.
Nonetheless, he had more hits than any other player and that makes him a HOFer.
The fascination with OPS comes from a 1980s-era study which found it correlated better than SLG with runs produced... but they counted runs produced as runs plus runs batted in MINUS home runs. That was dumb. If they didn’t want to count one home run as two runs produced, they should’ve counted a run OR a run produced as a half of a run produced. If you do THAT, SLG is a better measure... even without considering stolen bases or walks into the SLG measure. What I was proposing (count walks as half an AB and half a TB) would factor walks into SLG, making it closer to OBP, and a more accurate measure of offensive production than OBP *or* SLG.
Even so, it’s just obscene that OPS ignores SB... and I would recommend factoring those in as half a total base, at least.
>> Nonetheless, he had more hits than any other player.... <<
THAT is ONLY because he hung on so long. Cut his career shorter by seven years, and his OBP or SLG is still pretty damned mediocre, especially considering he was essentially a National-League DH.