Just one other person who watches over everybody. Nick Fury. He kept track of Banner when he was on the run before Avengers, including keeping others off him. He's the type to follow up, that's his MO. Though that doesn't mean it's going to be a friendly "how ya doin'?".
Loki is being celebrated as a hero by the viewers in the TV show. But really, he's just the protagonist (see the earlier confusion in this thread between antagonist and villain), and he's not stopping the pruning for some grand heroic gesture for the people. He's doing it because it will save his life with the TSA coming after him, and also because it doesn't fit his mental picture of how the universe works so it's abhorrent to him. Regardless if he is doing good (or not), he's not doing anything heroic which takes intent.
Well, that's what the Sokovia Accords represented, right? The Avengers were operating at their own discretion, but brought together by SHIELD and Nick Fury, with some government oversight/monitoring from them. And with SHIELD and Fury in turn reporting to the World Security Council. The Ultron/Sokovia incident led to an ultimatum to the Avengers, and to all superpowered beings generally, to register and operate only under direct government control.
I had been focusing on folks who hadn't been dusted, personally. Although I guess it's hard to say whether folks who were or weren't dusted would be in a better position. Natasha, for example, had five years to think about stuff, but also five years' distance from what happened. Nick would have it fresh in his mind when he poofed back into existence, so it's as recent a memory for him as it is for Wanda. But both would be dealing with the chaos of the world's population suddenly (re)doubling.
