Ralain

It's not heavily modded, it's heavily structured. All vanilla.

White Tiger has tons of custom recipe changes and as such is not to be considered vanilla.
The only thing WT does not have is any content-adding mods, the only thing that requires download is the WT settlement flags that any settlement can send in for their usage.

Jealous-Incident-413

White tiger has used mods in the past, to varying degrees. Some of these things have later become official. It 100% is always running some mods, such as mods for extending what variables laws can manipulate, and logging of player actions.

Typical admin tools generally aren't considered removing a vanilla state (and nearly all populated servers use some), but that isn't relevant as it has tons of recipe changes.

AramisFR

It's not purely vanilla but as someone enjoying vanilla & hard collaboration, Mighty Moose is a nice server that is lightly modded, aka still plays very vanilla but with things made smoother (and exhaustion, but smartly modded)

Yes, we can recommend that server especially for players looking for a nice experience with exhaustion as well, though I'd personally not consider it vanilla if pure vanilla was seeked, it uses some mods that alter gameplay from vanilla - might be good enough for "enough vanilla", though. They're part of the upcoming recommended servers program.