one who sides with the truth

Hi teachers,
Are these correct?
1: One who supports the truth always dominates.
2: One who sides with the truth always dominates.
3: One who supports/sides with the truth is always dominant.

Many thanks.

2 is incorrect. The others are incomplete as standalone sentences and need context. It is possible that they would then be correct (depending on the context).

Thank you, BN.

One who supports for the right, always dominates. Is it also a standalone sentence?

It isn’t a correct sentence. I suggest

One who supports a righteous cause always dominates.