Well, Lilian is not as powerful as Sylvanas is now (since she's not working for some angry bald guy), but she is pretty badass, if we remember Cata and MoP stories. I think she may be close to the power level of Sylvanas before Cata and allying with the Jailer.
Forsaken have Lilian, Alonsus Faol, Faranell the master apothecary, Velonara & Delaryn Summermoon are two of the well known Dark Rangers, Sira Moonwarden the Dark Warden, Belmont the commander of the Deathstalkers, Helcular who led the Hillsbrad defense during Legion invasions.Now they also have Calia Menethil & Derek Proudmoore and before the events of BFA Nathanos would also have been a Replacement. Now lets look at Darkspear TrollsRokhan, Zen'Tabra, Gadrin are realistically all they have unless you want to include Zekhan. Bwemba, Kin'weelay & Ur'kyo are past lore characters but have had very little to do in a long time and the majority of players probably don't remember their names.
Interesting change of pace. Why did they add new achievements instead of updating the old ones like before?