Use of more and as many as in different place

1) A grammatically correct English sentence indicating that the number of bacterial cells in the human body is equal to ten times (10x) the number of "human cells" in the human body (except there should be a "the" between "in" and "human") at the end.

2) An almost grammatically correct English sentence: if there was some quality that bacterial cells had ten times as much as, you could phrase a sentence correctly this way, e.g. There are bacterial cells ten times more virulent than human cells in the human body.

3) A grammatically correct English sentence (with one misspelled word) indicating that the number of bacterial cells in the human body is equal to ten times (10x) the number of "human cells" in the human body (except there should be a "the" between "in" and "human") at the end, despite omitting two words that, when added, still leave the sentence correct: There are ten times as many bacterial cells as there are human cells in the human body.

4) This one would need some work before it would be correct.

1) Is fine, but the other 3 are not grammatically correct.
Slightly better would be There are ten times more bacterial cells in the human body than human ones
"as much as" does not work the way you have tried to use it. The closest would be There are ten times as many bacterial cells as human cells in the human body.
or, with a slightly different meaning where "as much as" could be replaces by "up to", setting an upper limit
There are as much as ten times more bacterial cells in the human body as human ones.