I think Aegon will sit on the throne with Dany by his side. Gendry cant take the throne, he's a bas t ard and his dad stole it in the 1st place. He's there because not many smiths can forge or reforge valarian steel and he's mean with that hammer. Cersei.... Nah
At this point, claim to throne does not matter. Jon has more claim to throne than Dani but she most likely won’t give up her claim. Gendry is gonna rob that throne asap. Or, again, Yara.
My theory is either Jon himself or Jon and Daenery’s unborn child will take the Iron Throne. Cersei and Daenerys are not meant to rule and all the other remaining characters do not strike me as potential monarchs but I could be wrong. Guess we’ll find out in May. ⚔️