5. Senator Robert Kelly - X-Men/ X:2 (2000/2003)
Senator Kelly is a keen anti mutant lobbyist, claiming they are a danger to normal people, one of the key human threats to the X-Men in their time. In the film version, Senator Kelly is subject to Magneto's experimental machine, giving humans mutant powers. Ultimately Kelly escapes Magneto's custody and washes up naked on a beach. Anyone looking for some slimy old man backside tune in to 'X-Men'. Kelly's body rejects mutant powers and he is left as a gelatinous blob in the Xavier mansion; seeking help he eventually realises his mistakes too late and just sort of melts away in Storm's arms. Davidson returns to cameo as Senator Kelly in 'X:2', with the real senator dead Mystique imitates him to push through mutant laws. The character is neither here nor there, but for some reason they tried to produce a Senator Kelly mutant toy, deeming it too disturbing for children, check it out
here... a metled human offspring of Mr. Potato Head springs to mind.
There is good and bad news, Davidson is not rumoured to return for DoFP, but the character of Kelly is a key part of the 'Future Past' story line. The whole premise is that Kitty Pryde and co. send Wolverine to stop the assassination of Senator Kelly, thus preventing a dystopian future where the mutants are hunted by giant Sentinel robots. The Singer version of Senator Kelly in the first two films wasn't much more than a talking head in a suit, simply there to provide some human threat to the films. It will be refreshing to see where he takes the new Senator Kelly with him being a much more focal part of the plot.