Ogres are fantastic. Don’t let the fact they are limited to just Tier 3 buildings dissuade you as they have some of the best all purpose buildings. They only get walls in the main settlement IF it is outside Ogre or Norscan homeland, but that’s okay because the big bois can’t really make it up all those stairs anyways.
Also, when defending a settlement, use their T2 towers (Cannon Towers). They are the best bang for the buck.
Their Tier 4 towers at a whopping 2000 supply only net you 1 extra cannon ball fired and more armor piercing damage. So nice against mammoths and dragons but overkill on anything else (even Chaos warriors get demolished by the Tier 2 tower). I’d rather have another two Cannon Towers, unless I find myself bottled up with only one tower available.