Looking for advice on a new phone

The primary things I'm looking for are a massive battery and I guess speed and performance in general. I don't give a rat's ass about the camera. The other stuff like size, resolution, display refresh rate, google assistant features, having a headphone jack, water resistance, durability, general aesthetic - secondary concerns. I want performance and a huge battery, preferably at as low a cost as I can get it obviously.

My day to day app usage is maybe a dozen apps involving some games, messaging apps, some misc. etc.. I know it's not a huge deal but I'd like to maximize performance to minimize in-game lag or whatever.

I've been eyeing the Asus ROG phone - 6000 mAh battery + flagship phone specs + headphone jack, at what seems to be a reasonable price. But I wanted to get some other opinions from more informed people. There seem to be different models and I'm not sure which one to buy. And are there existing better phone options for what I'm looking for? Am not a huge techie. Thanks.