The Lord of Baal, Commander Dante. He has the wisdom of age on his side, having organized campaigns before many of the others' great grandfathers were birthed. He may not be the strongest but he is cunning and clever as well as politically astute; something many Chapter Masters lack. In a complete free-for-all, he would bide his time, letting the strongest destroy and weaken each other, possibly uniting some of the others to a temporary alliance. Those of great strength would be too arrogant to ally. Lastly, Dante has the advantage of flight. Few other chapter masters use Jump Packs and none would be as skilled.
From the books I've been reading about the Blood Angels, it would probably take one of their successors' chapter masters to bring Dante down in single combat. Even then, he would be patient and let his foe weaken himself, fighting in a defensive retreat.
"Fetch me another plaything. This one seems to have broken." -Urien Rakarth
Space Marine- "This planet is ours, witch."
Eldar- "No ... This planet is theirs ..."
Last edited by Archon Dan; 01-02-13 at 04:51 AM.