What Greek hero traveled with Jason?

Answer 1

The following is true, but the major HERO that traveled with Jason was Herakles.

Added answer

There were fifty of them, sailing on the Argo:

1. Acastus
2. Admetus
3. Aethalides
4. Amphion
5. Ancaeus
6. Argus
7. Ascalaphus
8. Atalanta (others claim Jason forbade her because she was a woman)
9. Autolycus
10. Bellerophon
11. Butes
12. Calais
13. Canthus
14. Castor
15. Cytissorus
16. Echion
17. Erginus
18. Euphemus
19. Euryalus
20. Heracles/Hercules
21. Hylas
22. Idas
23. Idmon
24. Iolaus
25. Iphitos
26. Jason
27. Laertes
28. Lynceus
29. Medea
30. Melas
31. Meleager
32. Mopsus
33. Nestor
34. Oedipus
35. Oileus
36. Orpheus
37. Palaemon
38. Palaimonius
39. Patroclus
40. Peleus
41. Philoctetes
42. Phrontis
43. Poeas
44. Polydeuces (or Pollux)
45. Polyphemos (Eilatos' son, who fought with the Lapiths against the Centaurs)
46. Poriclymenus
47. Talaus
48. Telamon
49. Tiphys
50. Zetes