Janeway was full of wit. As an actress she had a lot of body humor. 7 was also understated in comedy, she knew how to convey dry wit. Ethan Phillips knew his comedy and how to self deprecate.
I remember hearing Wang at a con complain that he (Wang) was full of funny ideas and a comedian but they wouldn't let him "do" the humor, they left it all to Mulgrew and Picardo.