That last distinction goes to the Takashiba roller coaster, at Fuji-Q Highland theme park in Fujiyoshida, Yamanashi Prefecture, Japan.
The coaster was manufactured by Gerstlauer, and is a Euro-Fighter steel roller coaster.
Takashiba has a drop angle of 121 degrees, which the Guinness World Records verified as the steepest coaster made of steel. (There are no steeper coasters made of wood, but rankings tend to be divided into the two primary materials for coaster.)
Even though the ride only lasts 112 seconds, that drop is enough to make a lasting impression on riders.
If you want more, watch a video from the front row of the ride.