Indian Lake sucks. It's even more shallow than Buckeye Lake.
I used to almost live on Griggs (our condo was against the park that is on Griggs). No tubing or Jet-Skis, but pretty smooth, and a nice place to boat. Probably one of, if not the, biggest wake boarding areas in Ohio.
I only live about 3 minutes from the O'shaughnessy boat ramp, so we hit that mostly now. It's like Griggs, except it is a little shorter but a little wider. Normally if you stay towards the west side, the water is glass unless it is windy. Middle and easy and it isn't as smooth. Decent amount of wakeboarding there.
Alum during the week only - it is 100% worthless on the weekends.
My favorite in Ohio is Muskingum in Zainsville - water is glass all the time, very friendly people, the channel lock-to-lock is plenty long, never too many boats (even on holidays).
If you want a decent lake, Seneca Lake is good too, with some good camping. Had my bachelor party there, and went there a lot growing up. Water is usually pretty decent there.
Delaware State Park is basically a slightly smaller version of Alum, and not worth driving further to visit. I have a buddy that lives about as close as you can to the Delaware launch, and he still goes to Alum.