Was wikipedia too much of a hassle?
https://en.wikipedia.org/wiki/Pythagoras_(freedman) https://en.wikipedia.org/wiki/Elagabalus
If you can understand italian I can suggest you Alessandro Barbero's Podcast, it's a pretty famous historian, there are several episodes about the topic.
I know where you're getting at - Not really the modern equivalent, only for the rich part of the population, contrasting opinions from historian at the time, etc.
But frankly the same objections could be raised even about the equally famous "did Ancient romans have running water in their homes?" question, and yet for some weird reason it's a far less controversial topic.
Moreover in the case of elagabalus, it's possible the stories were made up to discredit him and if they weren't made up they were highly scandalous and not at all well accepted. Forget marriage, even the insinuation he had slept with men was considered too scandalous to mention..
> Elagabalus had nothing at all to make up for his vices, which are of such a kind that it is too disgusting even to allude to them