Yes, it would be. But it is a poor choice for converting a predicate adjective into a leading one.
The term well-appearing might be misunderstood given the multiple meanings of the verb "appear."
No it is not hyphenated. They are two separate words.
No. Well above is not hyphenated.
No, well above average is not hyphenated.
Well-to-do is a hyphenated word. The direction west-northwest is hyphenated.
It should be hyphenated.
Yes it is, if it precedes the noun, as in "a well-known actress." If it follows the noun, as in "the actress is well known," it is not hyphenated.
To-night At a certain moment in time "well-come" used to be hyphenated.
well-meant
Yes
well-known
bond
It depends on how it is used. When it comes before a noun and acts as an adjective modifying that noun, it is hyphenated: We expect the holiday party to be a well-attended event. However, when it is used with a linking verb and does not come before a noun (that is, when it is used as a predicate adjective), it is not hyphenated: The free outdoor concerts were typically well attended.