Sounds like what you want is a grand touring tire.
not sure you got your size right. Your car is designed for ~24.2" tires. 225/70/15 is very tall, basically an SUV tire.
Anyway, you could go 195/65/15 probably if you really wanted to (your stock size is 195/60/15). Fender wells should clear for a 25" tire no problem even on soft springs. Lots of good grand touring choices there too like the Bridgestone Turanza Serenity.