The Scarecrow (Dr. Jonathan Crane) Created by Bill Finger and Bob Kane, The Scarecrow first appeared in World's Finest Comics #3 (Fall 1941).
The Penguin (Oswald Chesterfield Cobblepot) Created by artist Bob Kane and writer Bill Finger, The Penguin first appeared in Detective Comics #58 (December 1941).
Mr. Freeze (Dr. Victor Fries) Created by Bob Kane, Mr. Freeze first appeared in Batman #121 (February 1959).
Bane Created by Chuck Dixon, Doug Moench and Graham Nolan, Bane first appeared in Batman: Vengeance of Bane #1 (January 1993).
Mystique (Raven Darkhölme) Created by artist David Cockrum and writer Chris Claremont, Mystique first appeared in Ms. Marvel #16.
Strong Guy (Guido Carosella) Created by Chris Claremont and Bill Sienkiewicz, Strong Guy first appeared in New Mutants volume 1 #29 (July 1985).
Multiple Man (James Arthur "Jamie" Madrox) Created by writer Len Wein with script from Chris Claremont and art by John Buscema, Multiple Man first appeared in Giant-Size Fantastic Four #4 (February 1975).
Polaris (Lorna Dane) Created by writer Arnold Drake and artist Jim Steranko, Polaris first appeared in X-Men #49 (October 1968).
Quicksilver (Pietro Django Maximoff) Created by by writer Stan Lee and artist/co-writer Jack Kirby, Quicksilver first appeared in Uncanny X-Men #4 (March 1964).
Havok (Alexander "Alex" Summers) Created by writer Arnold Drake, Don Heck, and Neal Adams, Havok first appeared in Uncanny X-Men #54 (March, 1969).