Werecreatures in general may benefit from this due Moon Frenzy.
Wayangs don't have mecanic efects but their lore allows them to like such long night.
Darvakka (from Book of the Dead) also don't like the sun and also mechanic downsides as Sunlight Powerlessness.
Gogiteth don like the sun in their lore explanation.
Daemons lives in a eternal eclipsed sun. They may like such eclipsed scenario.
Deros are Vulnerable to Sunlight so may can appear too.
Many demons followers of Demon Lord Vyriavaxus, Lord of Shadows may also like such situation.
Followers os Zor-kuton and others darkness deities also may like this situation
Also many underdark creatures can appear due this darkness situation.