Well... besides the one in my avatar (who is also one of my employers)... Columbus Brewing Company, Jackie O's, Fat Heads, Brew Kettle, Great Lakes, Buckeye Lake Brewery, Seventh Son, Hoppin Frog, Thirsty Dog, among others.
As an ex-Ohioan that didn't start drinking till I moved away: when I visit home, I hit up Hoppin Frog, Fat Heads, GLBC and I try to find some Jackie O's on tap somewhere.
Fat Head's Jackie O's JAFB/Wooster Great Lakes Willoughby Pretty much in that order, but have't tried enough from Cincinnati and at would most likely shake things up, at least in the middle/bottom five.
Should also include Portsmouth Brewing Co. They started bottling last year for the first time since Prohibition.
In no particular order Fat Heads is the best IMHO Brew Kettle simple for Rajah (Black and White) Jackie O's Columbus Brewing Co (Bodhi is a not so hidden gem anymore) GLB Hoppin' Frog (tasting room is bad ass) Thirsty Dog There's so much super solid stuff coming out these days
Agree with most of the lists above. I would also add Rivertown to my list. They make some pretty approachable sours that I usually enjoy more than I thought I would. My list in no particular order is: Brew Kettle GLBC Fat Heads Rivertown Jackie O's (awesome bottle release) Thirsty Dog Maumee Bay Brewing Company
Columbus Brewing Company Jackie O's Brew Kettle Fat Heads Madtree Rhinegeist Hoppin' Frog Great Lakes
My top 10: Fat Heads Hoppin' Frog Columbus Great Lakes Brew Kettle Willoughby Jackie O's Mad Tree JAFB Thirsty Dog
No Order: Columbus Brewing Seventh Son Jackie O's Fat Heads Great Lakes Hoppin Frog Rhinegeist (Have not had a ton, but I have really like what I have had)
Cinci Rhinegeist, Madtree, Rivertown columbus Col. Brew Co, Elevator Cleveland Martket Garden, Greatlakes, Fatheads, Hoppin Frog, Rocky River Brew, Brew Kettle