Kayin wanted what was not his, and so he lost even what he had: Sotah 9b
Methuselah
Methuselah as one of the 7 "Shepherds" - King David, flanked on the right by Adam, Shet and Methuselah, and on the left by Avraham, Yaakov and Moshe: Succah 52b
Noah
Who are considered his descendants: Nedarim 31a
Gd states only part of Noah's glory to him, but praises him more highly when speaking about him in his absence; this avoids the appearance of flattery: Eruvin 18b
The dove took an olive branch in order to show its preference for bitter food from Gd, over sweet food from flesh and blood: Eruvin 18b
Og, King of Bashan
As a Giant, vis-a-vis threshold measurements for transgressions: Yoma 80b
Shem
Shem as the person known as "Malki Tzedek": Nedarim 32b
Avraham getting the right to have the Kohanimdescend from him instead of from Shem / Malki Tzedek, when Shem blessed Avraham before thanking Gd after the war with the Kings: Nedarim 32b
The case of Tamar was tried in the court of Shem: Makkot 23b
Shet
Shet as one of the 7 "Shepherds" - King David, flanked on the right by Adam, Shet and Methuselah, and on the left by Avraham, Yaakov and Moses: Succah 52b