us older guys like the cruisers. some stretch some regular. you can sit up straight and they have a really comfortable ride with the ballon tires and a springer front end really makes it nice or shocks. i have came to the realization that 99% of the frames you are going to have to do a little work to get the bicycle motor fit properly. so the way i would do it is find one you like that is comfortable and go for it.
welcome to the forum shawn! glad to have you with us