Age of Despair
Monsters of Krynn
Ogres and Ogrekind
Ogres as in MM
The most intelligent and cruel of ogre-kind, the ogre magi have spell-like abilities that make them formidable opponents. These seem to be innate, as ogre magi do not make focused study of arcane magic.
Hags as in MM, with the addition of some new types
Goblins and Goblinkind
Goblins are like a dark reflection of gnomes, and may in fact draw their linneage from gnomes in the mythic past. Goblins are small, nomadic and opportunistic, but they love to tinker and in particular build traps and, in large groups, siege weaponry.
Hobgoblins are the most dangerous of goblinkind. Large, intelligent, and possessed of a talent for battle and warfare, hobgoblins are military commanders and elite fighters among goblins.
Bugbears are the least common of goblins. Hulking and also stealthy, they tend to be loners, accumulating personal hordes in their caves.
Lord Soth, and his undead servitors, including the three bansees but also his skeletal knights and servants. There are also undead in other places in the world. Normally, undead are the result of evil will or of terrible disasters. Some are not intrinsically evil, such as those who are tasked or swear oaths to guard ancient crypts, but most are animated by malice and despair.
During the Age of Despair, there are only bozak, baaz, kapak, sivak and aurak draconians, and no Dragonborn as of yet. Draconians have advantage on saves against magic, elemental resistances, death throes, sometimes spellcasting abilities, but no breath weapon as they existed in the Chronicles.
Other Krynn Monsters
Bakali are lizardfolk
Dreamshadows and Dreamwraiths are really only applicable to Silvanost.
Sea-Devils: Kuo-Toa and Sahuagin
Creatures by Challenge
Giant wolf spider
Gnoll pack lord