Not quite true VJ.
A pair of fatasses isnt usualy a staple in a 4-3 defense. The "fatass" or very big nose gaurd (raji like) is a better fit in the 3-4 defense because there, a 0 or 1 tech is used. In this case you need a plug to avoid movement into the LBs up front and to eat up combo blocks and to the ILBs. Melton is the perfect size to play a 3 in our system. At the 3 tech you need to have explosivness to disrupt gaurd movement and have the giddy up to fight off being "reached or sealed" by backside OL in run plays. A plug isnt as effective in our defense because we are asking our 2's and 3's to be disruptive in the backfield, not protect the ILBs as you see in the 3-4. Melton is a good player for us, but if we must move on in order to nail down a LT then that is what will have to happen.
Now with that being said there are very large freaks such as the "williams wall" that are athletic enough to make the plays you ask need them to make. But it is certianly not a requirement for the 4-3 like it is to have a plug in the 3-4 at your 0 or 1 tech.

