Depends on what aspect you're looking for.
Do you like the raising simulator-like (idk the term), the night actions, the option to romance other girls?
my personal recommendations for the Raising Sim and Night Actions are:
1.) NLCH's Unobtrusive Sister
2.) A new one that's released called Intimate Days With My Tsundere Little Sister
3.) Yakumo Milk's A Month With My Sister
And my personal favorite (Since NLCH's game isn't complete yet)
How to Raise a Happy NEET