Welcome to Android Central! My husband had the LG G7 ThinQ and loved it. He used his phone for heavy gaming and the battery held up for the most part. However, since the LG smartphone division is unfortunately ending its production of smartphones, I'd suggest looking for a phone where you can get more software updates and support for longer periods of time.
If you are going to go for an "older" model, the Pixel 4a is great and is a steal to get at the moment.