Who we currently have. Since he got to Washington State his wins number is within a couple of games, give or take, as Snyder's in the same time period. I looked it up like a month ago. If Snyder were to stay on in certain this year would be an aberration and most years we'd be at 6-8 wins, that's exactly what Leach is.
I have no idea what Venables, LittreLL, Kleiman, Satterfield, et al would do here, I'm certain what Leach would do.
I think you're underselling Leach a little. He is pretty much 8 or 9 wins with the exception of a very rare high or low outlier. I would be really happy with that, especially if the person doing it is offensive oriented, crazy, and younger.
I get what you're saying that Leach probably won't get us close to the playoff in late November ever, but I would still take him with such a high floor.