The last knight is presumably what became the 40k plastic Imperial Knight kit. I went with similar colours to the others.
And here are all five, pictured as they stride across Abbey Road.
The two samurai guys are a lady with a fan, who I gave a pink robe, and what I thought was a wealthier chap, who is wearing a jacket and carrying two swords. His face was slightly miscast, so I ended up painting a scar down it to "hide" the error in casting. I rather like them both.
Only three more samurai to do now. I'm quite tempted by the Warlord ninjas, who look like a lot of fun (to paint, not to know).