That's not a problem - nothing wrong with some diversification, plus Ric, Ruffs and Sean are all members so I wouldn't let it worry you. Also there is a band in your chart with 'Iron' in the name and that's good enough for me.
Wahay! Looking good so far, perhaps some more Electric Boys though? Oh, and you could always join [group]Edward the Head's Pro Iron Maiden Anti Sharon Osbourne Martyrs Brigade[/group]...