Huh, really. I haven't gotten around to watching American Gods, and Westworld isn't my thing, but I also enjoyed the title sequence for The Man in the High Castle. It isn't one of the ones I'd watch every time, just because it's so chilling, but I do very much enjoy it. The show itself was incredible, of course, and also has a bit of a chilling feeling to it. It's a perfect fit.
Nice thing about the title sequence for The Man in the High Castle is that it doubles as an prologue in setting the story. Much nicer than having to read (or have narrated) a background story to get things started.
Westworld, American Gods, Man in the High Castle and Halt and Catch Fire.
https://www.artofthetitle.com/designer/raoul-marks/
https://www.artofthetitle.com/title/halt-and-catch-fire/