The problem is that fans seem to think that Zombies are the main enemy in the original Resident evil. RE has a plethora of other enemies like birds, spiders, snakes, sharks, lickers, those frog things, giant plants, tyrants. Zombies in RE have always been the level 1 enemy type with zombie dogs being level 2.
Seriously after your first real encounter with zombies there really isn't any sense of dread when you meet a them again in any of the original games. In fact you can ignore pretty much all of them from the outset.
Only in umbrella chronicles did the zombie menace actually cause some scares and those were only artificially made from the on rails scripted experience.
I enjoyed RE:4 And welcomed the change in enemies. I had no problem with 5 and RE:6 seems to be doing homage to RE:2 with a RE:4 spin.