MOSFET's... You will never find a more wretched hive of scum and villainy.

So - apparently there's a thing called an ideal diode that can be created using MOSFET's instead. 

For instance, comparing two circuits built in Falstad: 

1) Diodes in series with the power lines, compared to P-Channel MOSFET's (+ protective diodes and resistors)

Even using default values (there are better - and worse - components out there) the P-Channel MOSFET version provides a voltage closer to the source and provide the same features. This MOSFET version should be possible to use in my "vertical fuse holder"-design as well, but require a bit more components and "not as clean setup".

I will have to do some breadboard tests to see which one to use as both will work, but it's nice to keep as much power as possible so I'm leaning towards using the MOSFET one at the moment...