I do loathe the "more grounded, realistic take" that seemed to sweep superhero movies for a while, and feels like is still present, even if it isn't as much as it used to be. I know it's not Nolan's fault- moreso Hollywood's for taking the wrong message from it, but I'm so glad that we're pivoting away from that.
That's why I like the Titan Heroes Sentinels; they were a cheap alternative to the Haslab/made-to-order, but they're not obnoxiously large compared to the Legends. But they also show what, in my opinion, would be a pretty good compromise. They're maybe 2.5 - 3 times the size of the Legends themselves, which I feel like would be a good size in the movies too, if they were around, say, 15-20 feet. That way they're still imposing, but still not dwarfing other large characters. Such height may work in animation, but for live action, I think anything larger needs to be reserved for the bigger threats, like Galactus, or else they risk losing their menace too.
Actually, now that I'm typing all this out, I looked up the size of the Days of Future Past movie Sentinels, and apparently they were around 16-20ish feet tall or so, and I felt they were kinda undersized in that. Could work as either a Mark 1 Sentinel, or like a Sentinel Scout, but I think the base Sentinel should probably be bigger. But to each their own.