I have a Thoroughbred gelding built like a WB as well so I might have said TB based on the shoulders/withers and classic TB face. Kind of hard to see his hooves I am guessing they are probably larger than they appear in the photo based on the assumption at least partial of each appears to be sunk in the sand. My next guess, however, would have been Trakehner. :) He is a good looking boy either way though for sure and it appears somebody definitely loves him because he is obviously well taken care of (as goes for the facility in the backdrop). Congrats!