How many Star Wars Storm Troopers have there been?
Based on the LEGO wiki on Fandom, there have only been 7 different variants of the plain white Stormtrooper minifigure since they were introduced in 2001 (plus one Chrome-Silver variation).

If you also include Clone Troopers, Sand Troopers, Snow Troopers, Scout Troopers,  and other such armored soldiers from the Star Wars universe, that number would be much, much higher (also see 'Variations' at each of the links above).