Monster Musume no Oishasan

Same setup basically Difference MC is a Doctor who specializes in monster health and Chars have bit different personalities mostly same type like centaur and the others but they are not cardboard copies and it takes place in a age before cars  

Both are comedies with great worldbuilding that explore various cultures of non-human species. 

The atmosphere and the theme are very close between his two series. Monster Girls and their problem ... 

Harem comedies about a human male who encounters various types of demihumans and helps demihuman girls with their troubles. In Seton Gakuen the protagonist is a student, while in Monster Musume no Oishasan he is a doctor. 

similarities: Both have the ff: - A menagerie of harem members vying for the MC's love.... -A certain Cast who like the Guy but there were a lot of other cast who kept getting in the way. -A male MC who is very much awesome in most ways, but very much dumb when it comes to girls. dissimilarities: Mon Musu It was the guy's associate who like him, but other harem members keep getting in the way. The guy's specialty was treating the sick and injured demi humans. The guy's associate has a habit of being rough towards the guy especially when she feels jealous. Peter Grill: It was the male MC who like certain girl but there were things that keep getting in the way.... The male MC was a superb fighter who happens to be famous. Nearly most of the exotic girls wants to do the guy.  read more 

Both are about a medical practitioner in the fantasy world making the world easier to live in with simple medicine. 

if you liked Monster Musume no Oishasan then Demi-chan wa Kataritai is a must watch for you . similarities : almost the same theme - Monsters girls - one guy surrounded by lots of Monsters girls etc... 

Both are tales of an adult with professional job through which he meets various citizens of fantasy words and even gathers interests of some non-human girls. In one case the protagonist is a doctor, while in the other one he's a soldier. 

Has a similar baseline of a medical protagonist and a loving female assistant  

Episodical tales of a charismatic doctor as he encounters curious and unusual cases and how he tries to solve them and cure the pacients.