It's true that "Defenestration" is a good RPGM game but it's not the best one as you think! The best RPGM game as long is "Manila Shaw: Blackmail's Obsession"! After Manila Shaw,the next best RPGM ones are: "Chronicles of Leridia";"Anna Exciting Affection Episode 1"(Episode 2 is no longer RPGM but RenPy with options to click on the places at the map like it's in "Fashion Business");Living with Mia act1 act2 and act3 or simply saying Episode 1(they also make Episode 2 a RenPy but a full RenPy with only choices and not like Fashion Business or second part of Anna Exciting Affection where you can click on the map to go in some place and also they make a RenPy version on the original one RPGM Living With Mia and named it Summer with Mia and Summer with Mia 2,but still the RPGM one Living with Mia it's better since there you can play half the game with Mia too and do a lot of quests and side quests too);"The Office Wife";"Autumn Boulevard";"A new Dawn"(that one has some buggs but it's really good one);"Lily of the Valley";"Downfall:A Story Of Corruption";"Elena's Life"(that one is completed) and also "Officer Chloe:Operation Infiltration"(that one is completed too) - this are the best RPGM games so long but i agree that Defenestration is also a good RPGM game and if they continue the game at some point(since the developer has a problem with that because of the stupid russian war) may be can be added after a while to the list with the best RPGM games too!
There are also some other RPGM games which are also good like: "Caliross,The Shapeshifter's Legacy";"Agent Alona";"Peck Orbit";"Neon Oasis";"The Chant of Dead";"The Nights of Suburra";"Cursed";"Fragile Innocence";"Laura Lustful Secrets";"Lida's Adventure";"Lisa";"Saturday Night";"A New Beginning";"Council of Lies"...So if you too like RPGM games as me then i suggest you go try some of that ones if you still didn't play them!