Zipporah and Joab

 These two people don't get the credit they deserve in the Bible. If it wasn't for Zipporah Moses would have died on the way to Egypt and the children of Israel would still be stuck there today. And Joab saved the kingdom for David many times, but two times were critical; Joab killed Absolom and Sheba the son of Bichri. Israel would have collapsed in ruin without Joab. Joab is possibly the most faithful person in the Bible.