You could look for names that evoke similar feelings. For example, if you associate "Tyler" with strength or nobility, you could consider Greek names like:
* Τύμβωνας (Tymbonas): This name evokes a sense of strength and monumentality. It's not phonetically close, but the feel might be similar.
Ultimately, the best "Greek" equivalent depends on personal preference and the connotations associated with the name "Tyler." You could also simply transliterate "Tyler" phonetically into Greek script: Τάιλερ (Tyler), though this doesn't provide a "Greek-sounding" name.