Spirited races on both sides, but the customary Africans aside, how about Molly MF Seidel?
M-MF-S: *shows up at Trials*
People: "Sure she did great at shorter distances a long time ago, but she's never run a marathon and has been injured/battling demons forever. She's gonna get blown away!"
M-MF-S: "Second place bitches!!" (yes I'm quite confident she said "bitches" in her head)
M-MF-S: *shows up at Olympics*
People: "Sure, she did great at the trials and London, but she's running against a metric fuck-ton of people with PRs 5+ minutes faster and isn't even the top American. She's gonna get blown away!"
M-MF-S: "BRONZE MEDAL BITCHES!!"
M-MF-S: *shows up at NYC Marathon*
People: "Sure, she's an Olympic medalist, but the conditions were rough that day and they took it out so slow and left it wide open for crazy stuff to happen. What about a race with perfect conditions at a fast pace? She's gonna get blown away!"
Africans: *just miss course record, with the first time three women (or like, more than one) have cracked 2:23*
M-MF-S: "4th place, minute PR, and American course record bitches!"
The bar keeps getting raised and she keeps responding in dramatic fashion. Doubt her at your peril, because she means business. Also follow her on the socials because she's fucking hilarious.