My current favorite band does a good job of blending the two genres, providing the edge of rock with the thick, full theory of symphony composition, and they are without a doubt the band that inspired me to grab a guitar. The band is Kamelot and, though they recently had a lead singer change, the lead guitarist Thomas Youngblood was (and still is) a founding member. Take a looksee if you have the feels.
http://www.youtube.com/watch?v=oSylbQEHhVo
I'm also a big fan of The Police/Sting. Though I was younger and they really never inspired me to follow their path, I listened to them for countless hours and want to learn more than a few of their songs.
Our lives are one, colliding up and beyond
In this fatal possibility
~Coheed and Cambria, Gravity's Union
In this fatal possibility
~Coheed and Cambria, Gravity's Union