I'd go a Half Minotaur Half Ogre stronghart Halfing instead of anthro Elephant. Only 2 LA. I'd remove Half golem and Mineral warrior to add Lolthtouched. Thats 3 LA total. + 1 for feral.
LA 4
Fighter 6 (Dungeon Crasher)
Don't know how you get Walhulk 10 in the build but add that
Hulking Hurler 4.
OP as hell. Not as strong as your first guy, but more powerful.
Just to see
STR: 18+20+12+8+6+4+6=74 (32)
Dungeon Crash for 8d6+96 damage. Then hulking hurler does huge damamge.
Feats: (prerequists)+ Power attack, Cleave, Knockback, Improved Bull Rush, The feat that makes Ubershargers lose AC isntead of BAB. maybe others.
When you attack, you can substract your AC by your BaB to add twice that amount to a Bullrsuh attempt to everything you hit because of warhulk. Deal normal damamge AND Do opposed STR check + 2x your BaB. For every 5 you beat them by you throw them back 5 feet when you hit them and if they hit a wall, they take 8d6+96 damamge.