Here's mine, though I admit only Flynn is a match for the actor.
In the book Mohammed is a tough ex-soldier, a former NCO of the Schutztruppe who deserted (something to do with stolen money or booze, I forget which), so I didn't think an Ian Holm lookalike was for me, as he doesn't really look much like an askari. My Roger Moore has a moustache, because by my reckoning in 1913 someone like Roger Moore
would have a moustache.
This Copplestone figure was my choice for Rosa (don't have a picture of my own handy):
Though she doesn't have a rifle.