I don't know if it's too late to posit "solutions" to the aforementioned chronology problems but there's a different version of Hylas' parentage which calls him the son of King Keyx and Queen Alkyone of Trakhis, neither of whom are directly related to Orion. If there's a need to make an association between Hylas and Herakles this genealogy would still make sense since Keyx and Herakles were good friends.I'm not using one source or another for my argonauts, instead I took all names from several lists and I'm picking 48 from that (my character Klea and her companion taking two places to have 50 argonauts), some I chose because they have to be in that journey, but most others were selected based on who I can introduce in the webcomic before the journey, so by the time the journey takes place readers don't have to deal with too many unfamiliar faces/names. My list is not complete, I've chosen 42 so far, it was 43 but later I decided to place Iphitos death a few years before the journey. I'm not including any of Dionysus sons in the Argo. As for Hylas, he won't be related to Orion.
Athena actually talks about Aktaion's death to compare it to the blindness of Teiresias (not sure if this has been brought up? The whole 'Kronos fault!' led me to recalling it)
Therewith the mother clasped her beloved child in both her arms and, wailing the heavy plaint of the mournful nightingale, led him away. And the goddess Athena pitied her comrade and spake to her and said: ‘Noble lady, take back all the words that thou hast spoken in anger. It is not I that made thy child blind. For no sweet thing is it for Athena to snatch away the eyes of children. But the laws of Kronos order thus: Whosoever shall behold any of the immortals, when the god himself chooses not, at a heavy price shall he behold. Noble lady, the thing that is done can no more be taken back; since thus the thread of the Moirai (Fates) span when thou didst bear him at the first; but now, O son of Eueres, take thou the issue which is due to thee. How many burnt offerings shall the daughter of Kadmos burn in the days to come? How many Aristaios?--praying that they might see their only son, the young Aktaion blind. And yet he shall be companion of the chase to great Artemis. But him neither the chase nor comradeship in archery on the hills shall save in that hour, when, albeit unwillingly, he shall behold the beauteous bath of the goddess. Nay, his own dogs shall then devour their former lord. And his mother shall gather the bones of her son, ranging over all the thickets. Happiest of women shall she call thee and of happy fate, for that thou didst receive thy son home from the hills--blind. Therefore, O comrade, lament not; for to this thy son--for thy sake--shall remain many other honors from me. For I will make him a seer to be sung of men hereafter, yea, more excellent far than any other. He shall know the birds--which is of good omen among all the countless birds that fly and what birds are of ill-omened flight. Many oracles shall he utter to the Boiotians and many unto Kadmos, and to the mighty sons of Labdakos in later days. Also will I give him a great staff which shall guide his feet as he hath need, and I will give him a long term of life. And he only, when he dies, shall walk among the dead having understanding, honored of the great Leader of the Peoples.’
So she spake and bowed her head; and that word is fulfilled over which Pallas bows.
- Athena to Khariklo (Chariclo), mother of Teiresias; Callimachus, Hymn 5 Bath of Pallas