After Tuesday, I see Ossoff as the frontrunner for 2028. That race was called less than an hour after polls closed and demonstrated how strong of a candidate he is.
If Ossoff is the centrist pick, then progressives need someone to counter him. Someone young, charismatic, and bold. Progressives can attack him for saying America's commitment to Israel is "ironclad." He walked it back during this election though. He also doesn't support Medicare for All.