Happy to help. I don't why it is so hard to find good free BxG.
Got some more, not the greatest things out there but aren't bad either imo:
For Amerta (Itch)
Porcelana (Steam)
Without Romance (Steam - note it is very short)
Synthetic Fantasy (Steam)
For full commercial VNs:
The Fate S/N and Tsukihime VNs have fan browser based versions which are good (and are legally in a grey zone) + while they have H-scenes they can be turned off (for the fate one at least)
Ever17 and Remember11 could be considered abandonware and can be found on abandonware archives. Haven't got round to them properly but they are really good.