Out of curiosity, if you had included S1 characters, around where would Sean Bean have placed?
That's a good question! Hrmmm... probably between Allen and Turner. If I were ranking simply based on S1 material, though, he'd definitely make the top tier (since Headey/Turner weren't as good in S1 and Allen had nothing to work with - Dance had very little material as well).
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When you have nothing to say, quote yourself ~ Solfadore