Takenaka Hanbei is a very good tank, just finished the daily Challenges against 5 black samurai and she survived 3 turns against 4 samurai all hitting her, all with 0% HP. If the enemy has no Aoe or reflect, she is godlike. (not mentioning i'm 4k/3k ATT/DEF and the samurai were 6k ATT/DEF)
I do also have The Dragon of Echigo and struggling to find the correct unit. The reflect skill is probably the one difficult to synergies with, the japanese wiki suggests Corsairs for the reflect. From Temple units i was thinking about commando trooper or ghost ninja.