Wikipedia also says that Radar is the tallest that's living.....
The worlds tallest living horse is a Belgian Draft named Radar. Radar is a gelding, born in 1998 in Iowa. He stands at 19.35 hands, which means he is approximately 6 foot 7 inches tall at the withers. He weighs over 2400 lbs. He is currently used by Priefert Ranch Equipment for promotions.
Yeah, the tallest horse (that I know) is Goliath and he's a percheron gelding. He's really sweet, I've seen him in town when he goes on tour.
Yeah I have seen him, I was in the 6th grade the last time I saw him and I am now in the 10th. He was nothing but HUGE. Beautiful too. I think he travels all around. He and his team come here once a year to a western store. I have only been once but I would like to go see him again.