Le Pro are good tips, but they are inconsistent. Take a box of 50 Le Pros and there will be at least a dozen that are just plain worthless. Of the remainders, half will wear irregularly and play inconsistently. Maybe half the 20 or so left will play really nicely.
Elk Masters are awfully soft. If you like that spongy feel, they will perform okay. But if soaking them in milk and pressing them in a vice to make them harder is the answer to them being too spongy, what's the point of choosing a soft tip?
in my opinion, of the solid tips, the clear winner is Triangle. Tip to tip, box to box, they are remarkably consistent. Every Triangle plays as well or better than the select best Le Pros, but with more feel. The Triangle tips hold their shape really well, yet they are not bone hard. They are not prone to glazing over like Le Pro, either.
I'd place the Moori III M and Everest as slightly better than a Triangle for tip wear. Other than that, all three tips play and feel very, very close. It's a difficult choice between the three. That said, Triangles cost less than a dollar each, while Everest and Moori III cost $10-15 each.