I found what I was looking for; it was in Pardus all along, but I didn't know where to look.
Tasma | Peripherals | Keyboard Layout | the tab that says Xkb options.
Click on an empty checkbox that says "Enable xkb options". That will allow you to access the list below there. Scroll down about a third of the way, and you'll see "Compose Key Position". Click on the empty checkbox to the left. You'll notice that the seven boxes below "Compose Key Position" also light up; you may want to deselect most of them and concentrate on using one.
I chose the left Windows key (LWinKey). Now, by hitting LWinKey ' e (consecutively, not as a chord), I can produce é. LWinKey and two spaces produces a non-breaking space. LWinKey s s produces the German letter ß.
There is a huge list of these things here