I have an idea of the kind of monster I want my party to face in their next big encounter, but I don't have enough free time to go through the beastiary to find an existing creature that fits the idea I have in my head. I'd like to use an existing creature, or at least use one as a template, rather than invent all the stats myself.
My concern is that this would be a question that might have multiple answers that may be too subjective. I do believe I can phrase the question to invite specific answers, but I want to check that it's OK to try before I post it.