Kenpuu Denki Berserk, Versailles no Bara Recommendations
Both are reasonably serious shows with a focus on political intrigue, back-stabbing nobles and how cruel people can be. But Berserk is set in a fantasy universe with demons and monsters, with a lot of battles, whilst RoV is a historical anime that takes place in France, documenting the beginnings of the French Revolution.
Also, Griffith looks awfully similar to Lady Oscar (all that long, fluffy hair...)
While Berserk is a fantasy anime and Rose of Versailles is more focused on romance, both have to do with political intrigue, nobility's schemes, betrayals and kingdoms in crisis. Miura, the author of Berserk has stated that Rose of Versailles has been one of the many inspirations behind his writing.
While Berserk is much bloodier than Rose of Versailles, both series are about a nation in conflict (the nation in Berserk is in war, the nation in Rose of Versailles is on the verge of war). Both put focus on the backstabbing that happens within the nobility on a regular basis (this plays center stage in Rose of Versailles and takes a very important back seat in Berserk). Neither series shy away from showing the harsh truths of life.
Berserk has the "rich people are awful" perspective shown from soldiers, with Rose of Versailles has the "rich people are awful" perspective shown through rich people.
Both are war stories with characters who you get to see grow througout their lives. Berserk is obviously more fantastical, but both focus on the human element of war, and let you see the gruesomness that happens from all perspectives.
From what I've read about Berserk's creator, Kentaro Miura, Berserk is essentially the world's best and most popular piece of Ladyhawk/Rose of Versailles/Fist of the North Star crossover fanfiction, with bits of Devilman thrown in. The golden age arc, which the original Berserk series adapts, borrows heavily from the motifs and character archetypes of Versailles no Bara, and even as a casual viewer, I can see the parallels, particularly if one has also seen the relatively obscure film Ladyhawk, of which Miura is a professed fan.
Essentially, if you liked the golden age arc of Berserk, you'll probably like Versailles no Bara, and vice versa. Berserk