Total War: Warhammer III's Immortal Empires campaign is without question the best way to play Total War Warhammer and arguably Total War in general, and will likely remain so for many years to come.
While not as good as Total War: Warhammer I & III, Total War: Warhammer II is one of the best Total War games ever made, and without doubt one of the greatest Warhammer games on the market.
Atlus has been accused of being "anti-Christian" or even "Satanic" in some circles; however, upon further inspection, that may not be necessarily true.
Crafty Survivors is undoubtedly one of the most comprehensive, well-made and executed "Vampire Survivors Clones" on the market, and I cannot recommend it enough.
Total War: Warhammer is, without question, one of the greatest strategy games of all time, and the start of a series whose legacy continues to grow even as it races towards its 10th birthday
While Napoleon: Total War may not be the best Total War game, it is an excellent game in its own right, and I would love to see the developers return to it in some fashion.
While Shogun: Total War was ahead of its time when it released in June 2000, almost 25 years later, there is no reason to play beyond curiosity or nostalgia.