Hello, everyone. I'm just going to get right to it and say that I need help building a class that can tank. I am really new to Pathfinder and my entire group is basically new to Pathfinder/TTRPG genre. I have only done one campaign up to level 4 (my character died but that is a story for another time). So, in that sense, I would appreciate and better understand a more direct build that basically tells me what feats to take at what levels, stats, etc.
I have done hours of research trying to see if I can find such a guide and have learned that in Pathfinder there really isn't a specific tanking class and unfortunately I can not be a Paladin as a few of the members are Chaotic Neutral. Also, being so new to the whole TTRPG thing, I wasn't really able to understand the guides that were available.
The group so far consists of a Succubus (custom class that my DM made, basically acts like a Summoner), a Necromancer (maybe), a Shadow Assassin, a Monk, and a Cleric or Sorcerer (person has not made up their mind yet). We are 6 people total excluding the DM. Our DM is letting us use third party races/classes EXCEPT any Godlings, Giants, Dragon-related classes/races, Psionics, and Unchained.
Right now, I am thinking about being an Oread WarPriest but it seems that with our current party composition that we would lack a dedicated "tank." I am really interested in that kind of role since I never really played a tank before in any MMORPG. Any and all help will be greatly appreciated. I am open to any and all suggestions. Thank you very much for your time.