If you want the Ultimate Follower, go after the Dark Brotherhood thread and once you're linked up with Shadowmere, there is truly no other. He may not be a follower in the literal sense, but I do like having him along. The steed goes toe-to-toe (hoof-to-claw?) with dragons, while taking all the fire/frost damage they hurl at him. Badass? Oh yes. Guess I'm also a sucker for black, red-eyed horses, too. Saw him come flying down a snowy incline to help me battle a dragon once. One of the damndest things I ever saw him do. Also freaks me out (in a good way) when he goes after bandits or other hostiles in forts. Here's a horse running on a rickety bridge to get to them, which he always does. He's my competition for which one of us gets the kill. A truly awesome bud indeed!