Kalambay and Marlon are two of my favourites.I don't think I can split them .Both underrated and unknown to the casual fans.Don't know so much about Happy he was hard hitting if I remember correctly.
Probably Kalambay, just a shade ahead of Starling. Although Lora is one of those guys I could watch all day. Beautiful movement at the waist and fluidity...But he just didn't have the same level of contemporaries to test himself against as Kalambay and Moochie, and had a relatively short peak. Kalambay - Starling - Lora. All quality fighters who'd excel and give anyone a good fight in any era at 160, 147 and 118 respectively.