I think early Trigger has some great examples of anime as a visual medium - things like Gurren Lagann and Kill La Kill have such a distinct visual style that would be impossible to replicate using live action or CGI. FMA and Frieren could, however, just as easily be in a different visual medium and be more or less the same. And you're right that the fight scenes in each are fairly forgettable. I think the only one that stands out to me in FMA: Brotherhood is the one towards the end with Wrath. And I say this as someone who has seen a lot of anime - literally hundreds of series.