William Sadler (actor)

William Thomas Sadler (born April 13, 1950) is an American actor. He is known for his roles as Chesty Puller in "The Pacific", Luther Sloan in "", Sheriff Jim Valenti in "Roswell" and the Grim Reaper in "Bill &amp; Ted's Bogus Journey", "Tales from the Crypt" and "Bill &amp; Ted Face the Music". 
He played Colonel Stuart in "Die Hard 2". He played the character of President of the United States, Matthew Ellis, in "Iron Man 3", "Marvel's Agents of S.H.I.E.L.D.", and "WHIH Newsfront".