Meathead implies stupid and that is not Reacher. Muscle head may be a better description. Reacher is a very big guy in top shape. He is highly trained in most forms of hand to hand combat and has full military training as an MP. He is highly decorated although most of his medals are also highly classified. (ripped from Wiki) “His fitness reports rated him well above average in the classroom, excellent in the field, fluently bilingual in English and French, passable in Spanish, outstanding on all man-portable weaponry, and beyond outstanding at hand-to-hand combat. Reacher is described as a blonde man 6’5” tall weighing 250 lbs."
The author describes him as a knight errant who, after he resigned his commission rolls through life looking for wrongs to right. He is a bit happy go lucky in attitude. The guy that Amazon picked seems a whole lot more like Reacher than Cruise.