I have to agree, the original three "Dead" films Night, Dawn and Day of the Dead are classics of the horror genre, and I was dissapointed by Land of Dead and the remakes of Night and Dawn, I just found them unnecessary remakes of classic films that didnt need remaking and nothing spectacular in their execution and Land a dissapointing addition to a great trilogy which didnt need a fourth film.
As for the question I would say George A Romero is a better director than George Lucas.