Bro you have two options
if you are millage conscious person then simply increase the profile keeping the same rim size. like 185/70/14.
second option is to increase the rim size to 15. tyre options are 195/55/15 or 185/70/15
i am personally using 195/60/15 from last three years. no issue of ground clearance at all, even with three adults at back, on other side millage is also not bad, i am getting around 12 without AC in city.but it all depends on your driving style as well.