Person who's independent, much like a wild canine: 2 wds

• Independent sort
• Sole holdout on a jury, perhaps
• Sort who doesn't hang with others
• Independent agent to provide author with advance we hear
• Independent one
• Solitary person
• Solitary sort
• Not a team player
• One who shuns company

Wikipedia Word definitions in Wikipedia
Lonewolf is a French power metal band formed by Jens and Walkyr in 1993.