B747's - if you can take-off from a runway, then you should be able to land back on it at the same weight (minus burn-off) -autoland not recommended.
Boeing has, I believe, approved overweight landings for most occurences requiring an urgent landing - subject of course to the landing distance available being equal to or greater than the landing distance required. It's expensive stuff to throw away! An overweight landing inspection should not take too long, provided a low 'G' touchdown was achieved (obtained from the ACMS for the -400).