I'd argue that the invasion of Iraq benefited plenty of neoconservative aims:

1) eliminating a military threat to Saudi Arabia and Israel

2) placing hundreds of military outposts on Iran's doorstep

3) destabilizing Iran and Syria by empowering militant groups dormant under Saddam to re-arm and try to establish a Caliphate in Syria.

4) awarding trillions in no-bid contracts to Dick Cheney's Halliburton and a slew of arms manufacturers and private military contractors who could operate free of the burdensome rules of the Geneva Conventions. Halliburton received so much business that they moved their HQ to Dubai.