The person who delivers or writes a eulogy/tribute speech can be expressed as "the eulogist" or "the person who delivers (or composes) a tribute" in English.
"Eulogist" specifically refers to someone who delivers a eulogy, typically at a funeral or memorial service, praising the deceased.
"The person who delivers (or composes) a tribute" is a more general phrase that can be used in various contexts where someone is speaking or writing in praise or honor of someone or something.
For example:
The eulogist spoke movingly about the deceased's life and achievements.
The person who composed the tribute captured the essence of the occasion beautifully.