The answer to this is very subjective. There's no objective answer as to what is best. For some, their best hgame could be MGQ, for others it could be any of the Rance series, some others is Karryn's Prison, for me it's LonaRPG. LonaRPG doesn't have much when it comes to sex but the mechanics in this hgame is some of the deepest, most complex yet simple I've seen in any RPGmaker/H games I've played. I'm someone who look more for hgames that got a deeper game mechanics with the sex being an option, so LonaRPG fits the criteria quite well for me. Taking aside the devs questionable antics, there's so many things I could praise about this hgame, like having a dynamic AI NPCs where you can have them fight among each other, zero need to grind to get things done, so on and so on.