Koutetsujou no Kabaneri, Shisha no Teikoku Recommendations
The main story goes through living dead. It is true that in different contexts. In Kabaneri of the Iron Fortress the 'Kabani' is a kind of zombie with the power of infect other people, while in Seisha no Teikoku there are dead people that return to life through of the science.
Dealt with very differently, as the zombies are neutral entities in Shisha no Teitoku, the story is more inquisitive; a mystery-solving gallivanting adventure. The literary references are pretty off-putting if you're familiar with the works, but they're not heavy references, more Easter eggs for a Japanese audience who may not be as familiar with Western literary canon.
Kotetsujou no Kabaneri is more drama based, with good vs. evil. Focusing more on the sadness and loss that comes with fighting. The colours and art style for Koutetsujou is darker and the sketchy lines really helps to bring out the atmosphere.
Both have a good deal of action
Both series take place in a decidedly steam punk environment, take is somewhere in the past. There, a large portion on the anime is about dealing with re-animated corpses, aka zombies. If you're a fan of the steam punk genre, then you're definitely gonna enjoy the other series!