Toland is winning? Hah! Both were great people, but Osiris is better no question. Toland was an obsessed madman that risked six lives just to find out if he was right. The only reason we see that as acceptable behavior is because he was right. Think about it like Toland was saying "the Earth is flat" and then doing what he did to find out. Its ridiculous. Osiris found revelation after revelation about everything, including the Hive. Where Toland only brought us insight into the Bargain and motives of the Hive, Osiris told us about Crota and Oryx before the Vanguard lost a bunch of guardians on the Moon. Osiris did a lot more than that, though. Through him we know Guardians can't be simulated by Vex, the Nine are weak when they touch our world, ect, and a lot more about thanonautics, Vex, and the Darkness. Not only that, but he inspired Kabr to go to the Vault and Warlocks to study the Darkness (and work to stop it). More importantly, Osiris is still doing stuff. After he entered the Vex Gate Network and observed the patterns, Osiris teamed up with the Queen and Eris to stop Skolas, bait and kill Oryx, and hone guardians for what the Darkness brings next. It even seems he is the next main quest giver for Destiny 2.