You probably know this already but Oxford would be much more of a match than any US school of comparable quality. You could get a masters in four years and still end up coming to the US afterwards.
In the US I think you’d be well positioned to get into at least one of Berkeley or UCLA if those are of interest (and you are happy to pay the OOS costs). Many would say they should be classified as a reach for everyone, but in L&S (as opposed to Engineering) I would disagree (my S18 was comfortable applying to just those two UCs and got into both, albeit instate). And they don’t consider ethnicity in admissions.