Relativist
"Quincy Rortabender"
Positivist
"Rudy Reichfeigl"
Realist:
"Karl Selnam"
Pragmatist:
"Percy Lauwey" 
(Laudan himself)
Relativist position on "Justification" Positivist position on Justification Realist position on Justification Pragmatist position on Justification
Relativist position on "Progress"  Positivist position on Progress Realist position on Progress Pragmatist position on Progress
Relativist position on Theory-ladeness
Positivist position on Theory-ladeness
Realist position on Theory-ladeness
Pragmatist position on Theory-ladeness
Relativist position on Underdetermination
Positivist position on Underdetermination
Realist position on Underdetermination
Pragmatistist position on Underdetermination