I have found that I am able to have no caff energy if I skip out on the caff for several weeks. I don’t recommend the process lightly, as it is HARD. It’s worth doing, but doesn’t fix you today.
You might try cold brew coffee. Cold process prevents some of the things that bother people with hot process coffee. Cold brew is not iced coffee (in before someone says that adding ice to hot coffee is not a material change). Matcha green tea would be another way to get there, as it’s a lot denser in everything that normal green tea.
Nothing is really as caff dense as coffee without going energy drink. I guess if you were in the area I could flip you an amphetamine salt (I’m JOKING… that’s a felony).
the MCT might work well for you, but small dosing.