The standard scenario is a Shure 57, angled at about 45 degrees, with the tip of the mic about one inch above the metal top rim of the drum, pointing at the centre of the drum.
You should use minimal or no eq.
If you can't get a good sound it's either a problem with 1) the drum, 2) the room, or 3) the micamp you are using.
That's basically what I'm doing / using. I'm using 5 different snares, and getting virtually the same result echo-wise, so I guess it's time to start rearranging furniture. I have noticed some positive benefit by using a studio ring on the snare, but I don't think that's the real problem, and I don't really like the choked effect it ends up with.
My music room is a 14 x 30 "tube" over my garage, and as such is shaped like a bisected octagon with the ceiling cutting the overhead corners. Make sense? So, that may be part of it as well.
Thanks for the tips.