presenter

n. submitter, one who hands over, one who offers; one who demonstrates, one who displays

A host (sometimes hostess, in feminine form) or presenter is a person or organization responsible for running an event. A museum or university, for example, may be the presenter or host of an exhibit. Likewise, a master of ceremonies (also MC, emcee or host) is a person that hosts or presents a show. In movies, a presenter (but not a host) is a usually well-known executive producer credited with introducing a film or filmmaker to a larger audience.
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Noun
1. someone who presents a message of some sort (as a petition or an address or a check or a memorial etc.)
(hypernym) communicator
(derivation) present, submit
2. an advocate who presents a person (as for an award or a degree or an introduction etc.)
(synonym) sponsor
(hypernym) advocate, advocator, proponent, exponent
(derivation) introduce, present, acquaint
3. person who makes a gift of property
(synonym) donor, giver
(hypernym) benefactor, helper
(hyponym) abnegator
(derivation) give, gift, present

v. present, introduce, promote, proffer; set forth, offer; explain, nominate

(n.)
One who presents.