You can look for specifics on them at the wiki pages. Other than some skeletal dragons, that do not drop scales nor yield a soul their names are Dumehviir the undead dragon, two red dragons Nafaalilargus and Odahviing and the black dragon Alduin. There are a couple of other dragons inside the game. If this game mechanic bugs you, download this file and the epic score will play in every combat situation. Maximum level dragon introduced in Dawnguard most powerful variant. If you've ever fought with something in Skyrim as a high level character, you most likely encountered a situation where during the fight, no combat music was being played, unless the enemy was a dragon or very high-tier.
2.Durnehviir meaning Cursed with Undeath is the Skyrim dragon who can summon Bonemen with his Dragon Shouts. This is the name of the chief antagonist in the game Skyrim and is also called the World Eater.
Dragon: Brown-colored dragons they are the first dragons encountered in Skyrim and are the weakest.I think it is best to cite this wiki page here.