Winboard rating

[Kyodai]

Which engines are top-5 - regarding to real WB where no adaptor, polyglot is needed?

I have studied ratinglists like CEGT, CCRL and Ridderkerk - if we choose the CEGT-rating x64 and 4 processors I find

2944 - Naum 4.2
2881 - Spike 1.4
2789 - Thinker 5.4D
2690 - Scorpio 2.7

Are there any other WB-engines that qualifie for top-5?

[EdCollins]

Crafty ?

[H.G.Muller]

Perhaps GNU Chess 6, which is a WB version of Fruit 2.1.