May I recommend going into a Bike shop and seeing 1st hand, a few bikes..
test riding a variety..

in the slightly wider tire type there are hybrid, cross and 29er..
they share the same rim diameter .. 622/700c but the frame design is repurposed.

Generally straight bar 35 wide tire is 'a hybrid' drop bars same wheel type a 'cross bike'

fatter tire 50mm wide is a 29er

a road bike with narrow high pressure tires has been called a 'fitness bike'
when it has straight handlebars.
you can get a bike like Trek's Dual sport , and with smooth tread light tires
it will be a good mixed use rig.