I didn't see these guys play... but there's a reason why I know the names Rosie Brown, YA Tittle, Spider Lockhart, Brad Van Pelt, and Frank Gifford.
From the days of my youth, Lawrence Taylor, Leonard Williams, Mark Bavaro, Harry Carson, and Phil Simms are no-brainers. I Also respected the game of Carl Banks, Pepper Johnson, and Mark Collins (Collins shut down every WR but would always get smoked in the last two minutes of a game by Jerry Rice).
After that, Michael Strahan, Jessie Armstead, Tiki Barber, and Amani Toomer.
In the modern era, Eli Manning and basically that entire o-line in front of him from 2007-2011. Seubert and Diehl are probably my two favorite players from that group. I think Bradshaw, Jacobs, and Cruz also deserve an honorable mention.