Neil Armstrong is the first man who has stepped on the moon.

[diamondcutter]

1. Neil Armstrong is the first man who has stepped on the moon.
2. On July 20, 1969, Neil Armstrong became the first man who had stepped on the moon.
(By me.)

Are the two sentences correct?

 

[Tdol]

I'd use was in the first. The second is fine.

 

[diamondcutter]

Like this?
Neil Armstrong was the first man who had stepped on the moon.

 

[tedmc]

Why not just say:
Neil Armstrong was the first man to step on the moon?

 

[diamondcutter]

I just want to know more ways to express the same or similar meaning.

 

[5jj]

Unfortunately, your 'more ways' are less natural than ted's suggestion.