Buckles had the goofy looking head like Bold Ruler. I think he also looks a lot like Petition Petition Thoroughbred. He has yet another goofy head, think throatlatch and long lanky legs with too long cannons.
Dante looks a LOT like his grandsire, Seattle Slew. I always joke that Disney should make a movie about him and cast Dante, so he can make me some money!
He has the color, the head shape, and the expression (although Dante's is less look-of-a-winner and more Fresh-Prince-style-goofiness!)
Here's Seattle Slew:
And here's Dante:
Woo! Enough pics for ya? I swear, once I start I just can't stop.