Bee Venom is Acidic. If you quickly scrape the stinger off with thumbnail before it pumps lots of Venom into the wound then some Alkaline solution would be effective.
If I find the need to use something after a particularly painful sting in the wrong location, I will personally use
Bicarb of Soda, (Baking Soda in US English)
Salt
Colloidal Silver, only enough to make a paste
As the liquid I have heard others use Vinegar, or the juice of an onion