Well, people often want advice, and of course I give it, but my hands on experience is limited to a dozon or so brands. The article below reviews a full spectrum of trials and evaluations by the Electric Bike Report, with most brands represented. Of course the big players like RadPower, Aventon, and Blix all show up in multiple catagories.
Others have show up in a specific catagory (i.e. Lectric as the best inexpensive fat tire folder). Additionally, there is a section on batteries and their life cycles, all in all, this is an accurate introduction to ebikes in 2022, give it a look!