Which one is grammatically correct?
She is the most talented teacher THAT I've ever known.
or
She is the most talented teacher I've ever known.
Which one is grammatically correct?
She is the most talented teacher THAT I've ever known.
or
She is the most talented teacher I've ever known.
Both of them are perfectly natural and mean the same. 'That' is optional.
She is the most talented teacher that I have ever known or She is the most talented teacher I have ever known.
The present perfect tense refers to the past and connects your experience or event to the present.
Both are correct, but the second one is informal; it is recommended to use the first form in writing that is formal enough.