The person who delivers or writes a eulogy/tribute can be expressed in English as "the eulogist" (when referring specifically to the one delivering it) or more generally, "the one who delivers or writes a eulogy/tribute".
Here, “eulogy” typically refers to a speech or piece of writing that praises someone, especially after their death, while “tribute” can be a broader term for any expression of admiration or respect. If the context is more about honoring someone in a general sense (not necessarily posthumously), “tribute-giver” or a similar phrase could also be used, though it's less common. For most purposes, “eulogist” is the most precise term when specifically talking about someone delivering a eulogy at a funeral or memorial service.