comfortable ride

I live in Vermont - every way to bike is up or down steep hills. I'm looking for a high quality e-bike for road use, touring, and commuting around town. It needs to go on paved and dirt roads but not rough off-road terrain. I would like the bike to be comfortable; I'm not a racer so no need...

Hi could anyone suggest an electric bike for a tall rider, 6'3, 300 lbs, with arthritis in one knee, and a comfortable ride but not too slow. I am 62 years old and live in Miami beach and its flat terrain but I have to move along to keep up with cars. Thank you.