First off, ranking coaches is hard. It's a thankless job a lot of times and communities act like you're getting paid a BIG10 salary when in reality these guys are making $5,000-$10,000 max to devote the whole year to kids. They probably don't deserve the scrutiny of a ranking list... but here we go. Your list is pretty solid on coaches. I tend to think that Oak Harbor is currently the best program in the league by a pretty large margin and programs are usually a reflection of their coach. Looking at the website, they won league in both the high school and junior high levels, so I imagine they will continue to be in contention for league titles for some time.
Rutherford is a product of Eastwood, but I think he is a very good coach. The next few years will be telling as Otsego has a lot of young talent. It looks like their middle school teams were a mixed bag, but there were scores missing so it's hard to tell what's coming up outside of the freshman class that posters have mentioned previously. If he can turn Otsego into a consistent contender, I would have no problem moving him to that top spot.
Karchner and Cotterman are hard to place. They both seem to be solid coaches. Cotterman took over a well established program with rich tradition. He didn't mess it up. So there is a lot to be said for that. They also competed well in the playoffs with a deep run that ended at the hands of Edison. Maumee, on the other hand, was a mess when Karchner took over. They've turned it around to an 8-2 finish seeing him win coach of the year in just his second year there. That comes after making the move to the NBC where they are now the largest school in the league, so that's a factor you have to consider as well.
Fisher at Genoa always fields a competitive team. I doubt you will see them at the bottom of the league anytime soon. There is a lot to be said for that.
Bishop at Lake took over a program in a very difficult situation. I really think it's too early to rank what he's doing over there.
Angelone, same thing can be said at Fostoria. They seemed to be competitive though.
Drusback... Rossford was the biggest district in the league for quite some time and they haven't seen much success. The issues with Rossford have been well discussed so I'm not sure his ranking is deserved. The only knock I'd give him is the fact that Rossford seemingly refuses to play defense.