Can you help me decide what to sing?

I register lower baritone and higher bass. My voice is slightly gravelly but, I can make it completely clean or all gravel easily. My falsetto's are a bit weak and could use some work. I can go fairly low and can growl. But, I'm not sure what type of music I should emulate. I write riffs and usually play metal but, would rather try clean vocals for awhile. I sound something like Jonathan Davis, Chino Moreno, Aaron Lewis, and when I do covers I often harmonize with Jamey Johnson. Any advice? Or singers to cover?