B

Creature depicted in wall décor of sunken luxury liner named after a President whose first name is shared by one of the Major League Baseball Rookie of the Year Award winners in the year of birth of the first pick in the NFL Draft in the year of a presidential election in which the popular vote winner’s nickname can be (and was) represented by an element’s Periodic Table symbol whose letter(s) is/are not in the name of the element itself. (7 letters)