One-on-one Solas. If they were allowed friends Dorian has the Inquisitor(who effed up the orb and has been to the fade physcially twice) and the Inner Circle(Iron Bull angry and peeved Vivienne makes for a bloody battle) AND the entire inquisition(Cullen's men, Leliana's contacts) behind him.
Solas. Even though we all probably love Dorian a lot more, and Dorian is an incredible mage and extremely intelligent (time magic, for instance!), Solas is practically a god in elvhen terms... There's no denying his power. I get the feeling a lot of people just vote for their fave chars in these polls, and don't really consider the actual in game lore.