The only one that applies to me (though slightly) would be computer geek. I'm not really into computers, just online killing.
Actually, none of the people I know who like LoTR really fall into any of those categories. The thing is, people I know are completely obsessed with LoTR (ie. annual Gathering of the Fellowship, dressing up, watching all three back-to-back-to-back, etc.) but none of them are nerds or geeks in any way. A love of fantacy doesn't necessarily place you in that catagory, though very often it does.