I did find in the past that Jane Leeves did do voice over work, I think it was or Hercules (based on the movie who used the same artists who animated Meg from it and Jane from here) but anyway,
I found in the past that the character Jane from Tarzan has an oval shape and so does Jane from Frasier.
Looking at the two side by side with the exception of blue colored eyes I found that Jane Leeves from Frasier could definitely pass for playing Jane in Tarzan. First, they both have the same oval shape, very fair skin, English accent and even dark brown hair with fair skin. In addition, they both are known for musical, funny, eccentric yet at the same time, “Plain-Jane” down-to-earth characters.
All she needs is a change of wardrobe while wearing her hair in the up like in the beginning or later, letting her hair down much later.
So, let me know what you think of the visuals. I will elaborate if necessary and enjoy!