I can't say I've met them all; it's a pretty full Pantheon.

[Good luck making a family portrait, at any rate.]

Wish-granting's not usually a thing for most of them - though I met one that would help you in any one task if you caught her performing a miracle.

[That was Biddy, back in Ireland. A Goddess in disguise...]

And charges would vary, though definitely don't make promises you can't keep. And be careful of how you word them, though it's not so much about Them being tricksters as it is about both parties being exact.