The first round of the NFL draft always offers a vast blend of approaches. There are teams that fill pressing needs with ready-made playmakers, teams that rigidly abide by the best player available approach and teams that add long-term successors at eventual positions in question. But the hope, no matter the path taken, is for the selection to be an impact player. Some, from scheme fit and landing spot alone, have a better chance than others to make their mark this fall. Here’s Sports Illustrated ’s picks for the most impactful first-round rookies, featuring the draft’s top four picks and six players taken outside the top 10. Fernando Mendoza, QB, Las Vegas Raiders Mendoza isn’t as sure-fire a Week 1 starter as recent No. 1 quarterbacks, with Kirk Cousins firmly in the picture to command the Raiders’ huddle early in the season. But Mendoza will likely see the field at some point as a rookie, and he has a pro-ready skill set.…