i agree, they have been a pretty strong ally, they back us up even when they know we are in the wrong ala iraq.
Too be honest, I can't think of anyone even close. It is the UK and then everyone else.
Who else? I guess I'd have to say Germany (huge trade) or Canada (open borders, goes to war with us a lot).
Outside of that, it's hard to say. France, historically, has a strong relationship with us because of the Revolutionary War (although we fucked 'em over hard right afterwards) but recently they've spoken up against us countless times, Same with many Scandinavian countries. India has usually been pretty tight with us, but ever since we're increased corporation with Pakistan, that has soured. Japan too has been wishy washy.
We got nations like Italy, Greece, Australia, we have strong relationships but they haven't exactly gone to bat with us, and not a lot of trade. Egypt is gone, Saudi and the Gulf States play both sides despite our huge trade with them,
I mean, despite your hate for 'em, we have valuable joint R&D and intelligence with Israel, plus joint military operations and bases of assault for our idiotic rampages in the ME. They're a pretty valuable ally, spying aside (which we do like a mother fucker). Obviously, Bibi and his administration are tanking that relationship in the last half a decade.