You want classic, but not classical, but WOW TBC Gold classic but not traditional. I'm sorry, but it seems that you are just trying to play some other game, every private server that played Classic + died off after a couple weeks, literally the only reason you should play this awful 15 years old game is the community aspect.
On that point Classic has delivered a crapton more than any Classic + version would, it's an older game that's 15 years old to innovate and cheap Burning Crusade Classic Gold bring something new, and everything, they did, its called expansions . And while some suck, that is basically Classic +.