Copypasting from a tier list I made not too long ago.

3 - Houndmaster The best skill selection in the game. First, he gets, Dog Treat, a unique, free, boosting item that allows him to buff damage without wasting a turn. Hound rush is arguably the best damage skill in the game. Spammable, usable from rank 2~4, 100% damage, +100% damage in a mark comp and mows down enemies with mark+dog treat. It even applies bleed and has futher bonuses against beasts as a cherries on top. Whistle marks and is the highest prot debuff in the game. Cry Havoc is the only party-wide stress heal in the game, camping skills aside. Lick wounds is an awesone self heal. He even has the stun with the highest stun chance and a guard ability. Camping skills include the best scouting bonus in the game. Solid defensive stats. Good stun trinket. This guy is so good well rounded that 3 houndmaster + Rank 1 filler is actually viable. The only thing holding him back is that his base damage is low, so he needs either the treat or a mark to shine. He would be flat out game-breaking if he had Crusader/Hellion base damage and a clear #1 by a long shot if he had Grave Robber/Bounty Hunter base damage.

Tl.Dr: Best single target stun in the game, best spammable skill in the game, can self-heal, can self buff without wasting a turn, works from rank 2-4 and hits every enemy rank.