Most viable top lane tank now

I am trying out a lot of new champs to have a bigger champ pool. Looking for a tank that is viable this season. I was thinking about these ones, but I don't know if they are in a good spot right now: - Dr. Mundo {{champion:36}} - Malphite {{champion:54}} - Maokai {{champion:57}} - Singed {{champion:27}} - Nautilus {{champion:111}} Who would you recommend and why. Offcourse, feel free to add other champs. Thanks!
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