In 1932, no other coalition was present in the German parliament that together would have gotten a larger share of the votes than the NSDAP. It's one of the great historical tragedies that the Social Democrats and the Communists were unable to cooperate.

Still, it's usually the largest party (or the largest electoral winner) that gets first pickings to try to form a coalition.

There's a great distance between "first pickings to try to form a coalition" and "throw the main opposition in jail and fill the chamber with armed troops to ensure the rest vote absolute power for your party's leader."