The Evil Entity is more evil by a long shot. It's not even remotely close; even taking resources into account, it spent centuries manipulating and corrupting others so it could be released, which isn't even entirely offscreen/implied since we see the Spanish Conquistadors lay waste to an innocent village in a flashback under its influence. It's also revealed to be the reason Crystal Cove is the eccentrically crime-ridden place it is in the first place, and its corrupted victims include Professor Pericles, making it responsible for everything he does, and he's already quite a vile villain for a Scooby-Doo show in his own right. Then when it actually gets released, it ends up going on a feeding frenzy by devouring almost everyone in Crystal Cove to increase its power enough to free itself from the sarcophagus, and fully intended to not only consume the whole world, but go on to devour galaxies, just to satiate its insatiable appetite. Jacques was pretty dark for a Scooby-Doo movie too, but only to a certain extent compared to others, and even then, his actual actions were offscreen; the zombies themselves may be the evidence of what he did, but all we actually see him do is attempt to drain the life of Scooby and Shaggy. The Evil Entity was just flat-out abnormal and out of place; it wasn't just unusually dark and evil by Scooby-Doo standards, it may be one of the most evil characters I've seen in any animated show period, with even characters like Zhan Tiri coming off as similar, but softer in comparison.
Jacques
Evil Entity
