Historically: Weimar Republic, Czechoslovakia in 1948, Italy starting 1922, Austria starting 1933.
More recently: Venezuela starting 1999
Halfway there: Turkey starting 2017, Hungary starting 2010
If you broaden past just nations to include various organizations that used to be democractically organized at one point, you could make a much longer list...
Historically: Weimar Republic, Czechoslovakia in 1948, Italy starting 1922, Austria starting 1933.
More recently: Venezuela starting 1999
Halfway there: Turkey starting 2017, Hungary starting 2010
If you broaden past just nations to include various organizations that used to be democractically organized at one point, you could make a much longer list...