Mathematically improbable. Given the time that Saddam and his sons would have retained power and the number of deaths generally attributed to both sides, and adjusted for an annual rate, you get:

Saddam, not counting Iran-Iraq, averaged: 20,833-41,666 per year. (Between 500k and 1 million total).
Saddam, counting Iran-Iraq with the averages: 50,000-70,833 per year.
The US: high end estimate (ie. counting those indirectly caused by the security collapse in the early aftermath and things like bombings by terrorists killing civilians as well as US activity, etc.): 82,625-90,149 in all five years.
Means: 16,525-18,029 per year.

And this is not state activity. The vast majority of those deaths (and they count plainclothes insurgents as civilians) are caused by the activities of individual-individual violence rather than state (ie. US/Iraqi government) on individual violence.

Judging from all of this the invasion has saved between 14,016-271,540 lives in total.

It's a net gain for humanity, you human hating monster.