Mid-Range/Premium phones are a great price range for companies. They can either make a flagship phone and tune it down a bit to get amazing value or you can get a budget and turn its specs up a lot so its even better value. They are also a place where companies experiment and where you can get a truly amazing phone for much less than a flagship.
The Oneplus 8T is an amazing choice for a midrange phone since it has almost the same spec sheet as last years' 8 Pro, it has blazing fast performance, a good camera, and a great display.
The Pixel 5 is a good choice for someone who doesn't know that much about tech or knows a lot and wants a good camera. It has the best camera on any phone in this price range, an amazing UI and just an all around good phone. The display isn't the best though.
The ASUS Zenfone 8 is one of the best value phones ever. It has a SDD 888, a 120Hz 5.9" AMOLED display, a nice UI, some of the best speakers