Actually of all the options the iron hands are the furthest away from the codex chapter, both in appearance and organisation. Fists the closest to codex, Salamanders, flame specialists, Ravens, stealth and assault but all would look, in game terms anyway, very similar and the blood angels are also assault specialists and already in the game. And yes White Scars would be good as the next, hordes of mobile marines would look good, iron hands, the bionics would be a nice visual addition, and salamanders with a wealth of flame weapons cant go wrong as flamers were the most desired weapon on the space marine game. Personally if they could do legion of the damned properly somehow that would be good, or best yet a brand new chapter approved chapter the same way the blood ravens were born.
Bad poll there. You miss several chapters and you do not have the option "none of the listed" for those who has no interest in the few you yourself have interest in.
Iron Hands , hands down. They are codex divergent and the most tech marine friendly, also a new kind of Chaplin the Iron Father. Plus has one of the heaviest arsenals out of the marines.