You've just described the perfect offense--which unfortunately could never be built in the salary cap/free agency, "not for long" NFL.
IMO, today's GMs are nothing more than little Dutch boys continually plugging holes in their roster. Those that get lucky enough to stop the water from rising too quickly often get a ring. The rest just drown or learn to swim really well.
Getting the elements of your proposed O-Line in place would probably mean the WR group would have a weakness. Or the lack of a QB would rear it's head, like we've seen in Buffalo for so many years. Or a RB, TE or WRs would want "big money" and screw up the team's salary structure.
We can all build a fantasy team that kicks ass. The problem is, it's a fantasy...