Popular Thing Pose by Kirby, Kane, Buscema, Buckler and Perez

Classic Benjamin J. Grimm: standard shots of Ben as punching bag. 

Feb. 1968: Fantastic Four #71  Jack Kirby

Jan. 1973: Marvel Team-Up #6  Gil Kane

Dec. 1973: Fantastic Four #141 John Buscema

March 1974: Fantastic Four #144 Rich Buckler

Dec. 1976: Fantastic Four #177 George Perez
Perez changes the legs and adopts Buscema's open mouth expression 

 If Buscema's and Buckler's panels look familiar, it's because we've seen them before here and here.  How do Kane's and Perez's stack up?

Fantastic Four #144 (Pt 18) Reed Richards Gets His Man--Or Does He?

1968: Fantastic Four #71  Kirby                                                                     

1974: Fantastic Four #144 Buckler

Fantastic Four #141 (Pt 2) Classic Ben

1973: Fantastic Four #141 John Buscema

1968: Fantastic Four #71  Jack Kirby

Check out Rich Buckler's version of the FF #71 panel here ...plus his version of Buscema's #141 Thing here. 

Fantastic Four #143 (Pt 4) Darkoth, Reed Richards and the Gang

Fantastic Four #143 (1974) Rich Buckler

Fantastic Four #71 (1968) Jack Kirby

Fantastic Four #150 (Pt 4) Ultron and Ben Grimm

Fantastic Four #150 (1974) Rich Buckler

I'm sure there must be plenty of prototypes for the Ultron pose (such as in Avengers #57) as it's a fairly standard "attacking antagonist" pose, but here's the image that immediately came to mind:

Fantastic Four #71 (1968) Jack Kirby

Also, here's the Ben figure:

Fantastic Four #150

Fantastic Four #44 (1965) Kirby

Fantastic Four #144 (Pt 3) It Don't Mean a Thing If It Ain't Got That...

1974: Fantastic Four #144 - Rich Buckler

1968: Fantastic Four #71 - Jack Kirby