3. Gus G.
If you think about it, Gus G. came into Ozzy’s band at an awkward time. Zakk Wylde essentially found out that he was let go by Ozzy in 2009 from the internet (though it’s clear that he holds no bad ill towards his replacement). Yet since performing his first show with the Prince of Darkness at BlizzCon 2009, the Firewind guitarist has proven worthy of the job. And though he didn’t contribute much to the actual writing process for 2010’s Scream, Gus still played a major role in what many consider Ozzy’s best album in years.