I would like to hear some history of both US socialist movements and US action against socialist movements, as well as socialist movements in other countries. I would also like to learn about theory, and current affairs. It’s fine if it’s not all in one podcast, and I’m also open to one-off or series of podcasts focused on these historical aspects.
As someone else recommended in a top-level comment, Blowback is an amazing resource, especially season 2 and 3, which deal with the Cuban Revolution and the Korean War.
Podcasts on US social movements... that's a tough one. You'll hear some episodes covering this on RevLeft Radio but because most socialist movements in the US are either quite small and fragmented or they haven't achieved a whole lot there often isn't a huge amount to cover.
For US actions against socialism, Blowback is really good, as others have already mentioned. Others are American Exception and some episodes of Guerilla History.
For theory, I strongly recommend Red Menace as well as a lot of the stuff produced by Socialism For All. There's also Marx Madness, We Read Theory, Red Book Club, Radical Reviewer (on YouTube), and a lot of the episodes of Teach Me Communism.
For current affairs, there's Citations Needed, Radio War Nerd (specifically about wars), Everybody Loves Communism, The Deprogram, and some of TrueAnon.
While this next recommendation doesn't fit any of your categories, I'd also recommend Actually Existing Socialism because they interview primarily academics on their areas of expertise in socialist movements and it's really underrated, although it can be a bit dry so it might not be to your tastes.
My overall recommendation would be to try out an episode or two of whatever podcasts take your fancy to see if you like the presentation style and if it's to your preferred depth. Some of these podcasts are more conversational and entry-level while some of them go much deeper and lean towards the more academic side. There no right or wrong in this matter, it's just about finding what suits your preference.
Looks like you're right and Aaron Good is an opportunist.
I haven't been following anything of his closely but I know from listening to the early days of his podcast that it would be a decent recommendation based on OP's request.
I've gotta be honest with you, I'd say that 50% of my list I only suggested half-heartedly because I'm either suspicious of the hosts or because I don't find their work to be rigorous or principled enough to meet my standards but... that doesn't mean that there isn't useful or interesting content in there for others and I didn't want to push my own biases on OP.
Here's someone's take on Aaron Good on the topic of his support for RFK which I thought was a good one:
I think I read that comment a few months ago when i was double checking his bona fides, it really is too bad because he has interviewed some serious people
(it's a hilarious/brutal takedown that almost makes me feel bad for Good)
The app I use (Thunder, so I can see Hexbear stickers) has a glitch where if a post is deleted, there is no checkmark to dismiss it, only a respond button. In fact, I could not even see this post by clicking on it becaus it’s in a deleted post comment chain, I had to just press the respond button. I’ve already shared the issue with the devs.