If the OP were asking for a general purpose antenna recomendation, I would concur. The 7696 is a very good antenna, but I anticipate that the strong adjacent channel interference from WUVG is going to be too much for the weaker WKTB. Given the nearly 50 dB higher power levels, this qualifies as needing 'extreme measures'.
Given the specific request, I believe a very directional antenna like the 91XG is needed if WKTB is to be seen reliably. I would even anticipate that the OP may need to experiment with mounting locations and will certainly need to carefully adjust the aim for best results. Stacking for adjacent channel rejection may be needed as well.
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