Before Superman

There have been at least three versions of a pre-Superman superhero role for Clark Kent:

Superboy in comics;
Superboy in the Superboy TV series;
the Red and Blue Blur in the Smallville TV series.

There was a pre-Superboy "Smallville Angel" in some comics and in a Superman novel by Elliot S! Maggin.

There have been at least three spin-off Superboys:

the Superboy of Earth Prime before the Crisis on Infinite Earths;

the Superboy of the Time Trapper's pocket universe after the Crisis;

the Superboy during the Reign of the Supermen after the Death of Superman.

Smallville presents characters who are the same only in name as the original versions:

Pete Ross;
two Hamiltons;
Morgan Edge;
Maxwell Lord;
Cat Grant;
Glorious Godfrey;
Oliver Queen.