"whom" is correct (I assume "whom" is the pronoun you're interested in). In informal English, "who" is, in cases such as this, widely used and widely accepted (or at least tolerated).
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Mr Wordy"whom" is correct (I assume "whom" is the pronoun you're interested in).
In informal English, "who" is, in cases such as this, widely used and widely accepted (or at least tolerated).
Right! But if one insists on "whom", I think one should also insist on "on whom".
CalifJimBut unidiomatic: We need one person who(m) ... Yes? No? Comments?It seems OK to me. There are a lot of people involved in some activity or process. We need to be able to rely on (at least) one of them.