The question is based on a misunderstanding about dictionary notation. The question says
my dictionary says that hearken is divided into heark·en not hear·en
(sic—I presume hear·en is a mistake for hear·ken). But these dots do not represent syllable divisions! The Merriam–Webster dictionary, which is typical of dictionaries using this notation, explains:
The centered dots in boldface entry words indicate potential end-of-line division points and not syllabication. These division points are determined by considerations of both morphology and pronunciation, among others. Further discussion of end-of-line division is contained in the section of that name within the Explanatory Notes. In this book a consistent approach has been pursued, both toward word division based on traditional formulas and toward syllabication based on phonetic principles. As a result, the hyphens indicating syllable breaks and the centered dots indicating end-of-line division often do not fall in the same places.
‘Guide to Pronunciation’. merriam-webster.com
So the dots indicate where to put a hyphen when breaking the word at the end of a line in printed text, and do not indicate syllable boundaries.
But in any case, for English scansion it does not matter what you do with the consonants, because the stressed and unstressed syllables are identified by their vowel sound, not by the consonants on either side. A common way to write scansion is to mark the vowels only, for example with / or ´ for a stressed syllable and x or ˘ for an unstressed syllable:
x / x / / x x / x / x
With naked foot stalking within my chamber
This notation for scansion makes it clear that the vowels contribute to the rhythm and not the consonants.