Both Thamuz and Aldous are very boring to play tbh. Especially Aldous even though he is pretty good. Thamuz on the other hand is not good at all. I would say wait for Leomord.
Honestly, I bought Aldous and regretted it bitterly. One of the worst fighters in the game these days. Thamuz I do not know, from what I see, it's strong but not as much as I expected. Leomord looks like it will be cool to play, so I'll buy him.