In search of really strong Priest decks, here is Zetalot Season 29 Legend Priest Deck List that he played to reach legend. While Zetalot is obviously a skilled Priest player, this is list is good enough to reach legend and play against the tier 1 decks. So give this a try if you want to play some top -tier Priest.
It plays out like a typical control Priest deck. Control the board and clear minions while working to last into the late game and out-value your opponent. There is loads of healing and decent card draw, make the most of the synergies and squeeze all the value you can out of the deck.