In the Appearances collection, Tyrant King Battleplate is listed as Boss Drop. Appearance ID: 20166. 13 other items wear the same appearance; 9 of them are listed here.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Tyrant King Battleplate Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Tyrant King Battleplate suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Tyrant King Battleplate is part of the transmog set Battleplate of the Last Mogu (Warrior only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 95153 (95148 to 95167) were usually added in the same batch as Tyrant King Battleplate: the same quest line, zone, vendor or reward set.