Bahamut

Bahamut, the Platinum Dragon, divinity of good dragons, the sky, and magic.

Bahamut is a genderless deity (pronouns they/them when they appear in humanoid form they will take on a male, female, hermaphroditic or asexual aspect as it suits their mood or their perception of the situation.  In all instances, they present as an elder of their kind. 

The figure moves slowly in your direction. You see that they are elven, with long platinum blonde hair and silvery eyes; apparently aged but showing no sign of the weaknesses of age; and a body and demeanor that is genderless. Around them, fluttering in the gentle breeze, are seven large monarch butterflies.

— Bahamut appears to some adventurers

Bahamut nevers appear among mortals without their escort, seven ancient dragons. These may be of any dragon type -- metallic, gem, other kindreds, even chromatic -- so long as the dragon is of good and beneficient nature and has proved their loyalty and devotion to Bahamut. These dragons, unlike Bahamut themself, are yet mortal, and so on rare occasions do die and need replacing.

Their worshipers are widespread, and are certainly not limited to dragons. Temples to Bahamut can be found in major cities across all of Keradrin, and many smaller cities and towns as well. Because their remit includes magic, Bahamut (along with Sukunabikona) is a very popular deity in the magocracy of Khelat. Bahamut is also, not surprisingly, a popular deity within Vale Draco. It is believed that Bahamut was instrumental in establishing Vale Draco, and visits there themselves not infrequently.

Bahamut is one of the eldest of Keradrin's deities, and is well respected among nearly all of the pantheon for their wisdom. Sages record their advice during the crisis that elevated Tizareus to godhood. Some of the deities wanted to attempt to destroy the mad god, for fear he would use the forbidden knowledge that had driven him mad and (some say) caused his apotheosis. Bahamut argued that Tizareus should simply be left alone: "Given the nature of the knowledge he has taken, it is highly unlikely he will regain his right mind again. But should it happen, making him one of us will make it far less likely he will use what he took, or allow it to be used."