I’m not a doctor, and I’m also not a “health nut.” However, I do try to eat a healthy diet, with coaching from my doctor. The biggest problem I can see in the items you listed is fat content, especially in latkes and kugels. However, if they’re eaten in moderation and not the mainstay of the diet, they shouldn’t be an undue health risk. Cholent is basically a beef stew, which again is probably a ditto of the above regarding latkes and kugels.
The biggest problem I personally have is that a lot of the processed kosher items, such as chicken coating mixes, soups, etc., is the presence of MSG, to which I’m violently alergic. I’ve learned to read food labels real closely to avoid it.