Even if Chelsea Grin were on their A-game, they'd be a questionable choice. But their vocalist has completely blown out his voice. If you see recent live videos of them it's pathetic.
Same with Emmure.
Miss May I might be entertaining though.
12/27 - All That Remains/Jasta/Thy Will Be Done
2/1 - Amon Amarth/Skeletonwitch
2/23 - Between The Buried And Me/Deafheaven/Intronaut