下面的译文有语法错误吗？怎样翻译会更好？

Question

原文：最令我好奇的是画在墙上的那个人是谁？
译文：what wonders me most is that who the man is painting on the wall?

Answer 1

结构上分析：is后面是一个表语从句。不能同时用两个连词that 和 who引导。
所以，首先去掉who
逻辑上分析：找你的中文意思，主表顺序倒装一下才行。
Who the man is painting on the wall wonders me most.

Answer 2

结构就不分析了，Not my strong suit, hehe.

译文建议修改一下：

What makes me wonder the most is who that man painted on the wall is.
I am more than curious to know who that man painted on the wall is.本回答被网友采纳

Answer 3

What I am wondering most is that who is the man painted on the wall
画不应该用painting，因为人是被画上去的，要用painted表示被动，