Not a real person - Tony Stark.
The original CD release of that album (”Paranoid”), and in particular “Ironman” is a truly excellent recording. YouTube doesn’t remotely do it justice.
Ok, granted that to “do it justice” you are gonna need a stereo system in the $5k range at least, based around some GOOD high output speakers. For real fun, I’ve tried it with a JL Audio F113 subwoofer and my own design tower “satellites” (dual 6-1/2” 3-ways with top notch Vifa drivers). Those drum rolls of Bill Ward’s are something else! Still, I’m tempted to scale up someday to a design with either 4x 6-1/2” on each side, or at least dual 8” on each side, and maybe do something more with subs, too — cost being a prohibitive factor to actually own if JL subs, though... :-)
But he was writing it about himself in the final analysis. He was let go in 1979, because of his alcohol & drug abuses, but he came back from that, and went on to create a successful solo career. An Iron Man legacy he created after falling to the bottom. The same can almost be said that it was written for Trump as well, since he too is truly another Iron Man for his political return, especially in the face of adversity that most would never have survived, even if they too were wealthy beyond compare. Both beat the odds in awesome fashion. Both got their revenge, Ozzy by beating the odds of overcoming his addictions, & Trump from overcoming lawfare arrayed against him and winning decisively his 2nd presidential term with more real votes that no one can dispute was a fair & free election. 🙂👍