The amount people actually liked are surprisingly small.
New Scooby Doo Movies was guest star focused and way too long, both Scrappy shows sucked ass, 13 Ghosts failed, Shaggy and Scooby Doo get a clue was a failed hip reboot.
But(slightly above that), you have The Scooby Doo Show(weaker version of the original with Scooby Dumb added), Pup Named Scooby Doo(riding the 80s “kid reboot phase”) and Be Cool Scooby Do for being...itself.
The three most liked are the original (Where are you), What’s New, and Mystery Inc.The original hasn’t aged the best, and Mystery Inc is kinda it’s own thing, so What’s New Scooby Doo is probably the best example of ‘pure Scooby Doo.”
Possibly in general, not just on TV. Most of the 70s and 80s era films were both trash and heavily invested in the Scrappy Era shit (Ghoul School is the only good one, but it’s not typical Scooby). Arabian Nights is shit too.
Zombie Island, Witches Ghost, and Alien Invasion all break Scooby tropes and aren’t really typical, most of the ones after that either suck, do something weird, or are crossover focused.
