@david_ross I assume we're talking non-bot accounts?
Well, then @stellasroque is @OCCRP 's social media outreach person; @milica is an investigative journalist from #Serbia (of https://www.cins.rs/ fame). That's pretty much all that I remember off the top of my head.
I'm sure there are more. Journalists of #Mastodon, come out of the woodwork! ;)