He's a prime candidate for promotion.

他是最有望获得晋升的人选。

She's the ideal candidate for the job.

她是这项工作最合适的人选。

She's the perfect candidate for the job.

她是这项工作的最佳人选。

He is a candidate for the office of governor.

他是州长的候选人。

He seems a most unlikely candidate for the job.

他似乎是最不适合担任这项工作的人选。