I second the 650 but you could say I’m biased:) The only problem you may run into is that the front suspension is not adjustable and is a little soft. I’m only 150 lbs so it’s perfect for me. The rear is adjustable.
Ultimately, you should go to every dealership in your area and sit on as many different bikes as you can. I mean everything. Sports, standards, and cruisers. After sitting on 15-20 bikes you begin to figure out what is going to work for you.
When I was shopping for my first bike I ended up not liking what I thought I would like (sport) because it just wasn’t comfortable for me. I ended up with an ER6n because it was very comfortable and the ergo’s fit my body type perfectly.