I haven't heard much in this thread about match.com from you single cats or eharmony. Seems like it would be a viable route.
Match is the only other online thing I've used other than tinder. It's definitely more the route you want to go if you want to find someone with more substance than tinder usually (the girl I'm seeing right now I met on match and I can see this going somewhere, though we've only been dating for a few weeks so will report more later). There are some good girls, and a few good looking girls on match, but it takes some digging and little more work than you think. They give you daily emails about members that you "match" with and whatnot, but it doesn't take long for then to keep recycling through same girls. Is it worth it to spend the money on it? I would say yes, but be wary that if you pay for 3 months of membership, once those 3 months are up you have to cancel, or they will just sign you up for another 3 months without asking, so be careful. Also, learn how to write good emails, the more effort you put in them the more likely they will respond.