#1 was Dudley Moore. #2 was John Denver. #3 is Dan the Dyna-Myte.
IMHO, Deadpool is much more a ripoff of DC’s Lobo than Deathstroke. The initial parodic intent may have been Deathstroke, but Lobo’s the earlier-appearing rapid-healing profane-spewing wildly popular assassin/mercenary created as a joke storyline that took off.
3 DQs reserved.