You're great/terrific.
你好棒/好厉害.
I admire you.
我佩服你.
You're really cool.
你真酷.
You're amazing.
你真了不起.
You did a great job.
你做得很好.
You really impress me.
你令我印象深刻.
You're an outstanding individual.
你真是杰出人材.
You are a great asset to our company.
你是本公司的重要资产(台柱).