Fatalii was the first one to pop in my head when I thought citrus. I agree with the Limon chinense being citrusy too. Madame Jeanette and Devil's Tongue have that citrusy flavor but both are more balanced with smoky/nutty/peppery flavors too. My original Scotch Bonnet TFM has a very nice citrusy punch but again it's balanced with other flavors. Beth Boyd used to offer a strain of Cumari (the only strain I've ever grown, I know there are others marketed as Cumari or Cumari ou Passarinho) that was very productive and the fruit was a nice hot little citrus bomb. Beth also had a yellow Habanero strain that I wish I still had viable seeds for, that strain was just outstanding! It reminded me of a scotch bonnet but was different enough to say 'yeah, that's an Habanero'.
Honestly, I think most yellow chinenses have that citrus flavor, at least as an undertone.