A lot of bikes are designed for 120Kg plus 15Kg luggage, so you don't necessarily have to get a chunky bike if you're not carrying anything other than yourself.
I say that as a 19st bloke (121Kg) who bought an
Orbea Gain, which you might think is a bit delicate from the images. Not so. (The one bit I did change were the wheels, but I did go for the cheapest Gain.) It may not be the shape/type you're looking for, of course.