On the OBS Discord someone highly recommended Pinnacle Studio which has a free trial and is fairly cheap. Haven't come around to trying it though, my main experience is with Sony (now Magix) MovieStudio Premium and Resolve (free).
Have you tried Davinci Resolve ?? Not sure if that is any good for Gaming Vids.
On the Resolve forums I've been told to just use Vegas for that, but I think the people who did so have a rather outdated idea of "gaming vids". The software will sometimes fall over if you confront it with wildly variable framerates, and on older and worse clips I've experienced more than one crash.
It's free and quite capable, but it has a bunch of nasty bugs (foremost Fusion being unusable for longer single clips due to a bug that I've been reporting since the beta versions of v15). The free version is also rather dumb when it comes to hardware accelerated video decoding, so editing performance will be more on the "meh" side of life, especially if you record in h265. Audio handling (Fairlight) is
extremely nice though, and in a pinch it can double as a DAW. The h264 encoder is also not the worst and produces good results even at moderate data rates.