Sounds like you want a comfort or hybrid bike. What kind of surface will you be riding on? For how long? What is your budget?

I weigh more than you and I had a good experience on my Trek 7200. IT held up for 7,500 miles and 2 years before I got a different bike.

Whatever you get, you will have to spend some money on a good wheelset and seatpost. Also be prepared to have your wheel re-spoked every 6-12 months depending on riding conditions.

Good luck with your search. The best thing you can do is go by your local bike shop, tell them what you want and have them tailor a bike to your needs.