Shure SM58.
By coincidence, I've just had to repair mine today. At the last gig, on pulling the mic cable, the male XLR connector pulled out from the bottom. Now I know it should be a matter of putting it back and adjusting the grubscrew, but the screw was seized solid. I've had this mic since the late 1980's, and it has never failed me. It's had a couple of new screens over the years, and I put a new one on this year too, but it has never actually broken. Anyway, after an hour soaking with WD40, I was able to free the grubscrew and it is now back together ready for my gig tomorrow. It lives to fight another day, and I'm sure it will outlast me!
I also still have the SM57 I bought at the same time, and it is equally indestructible.
Rob