Brownlees SERIOUSLY impressive. Incredible athletes.
That quote about their training times: FIVE repetitions of 2:05m 800m runs, with a one minute rest in between. Astonishing
An Olympic sailing gold IS a big deal to be fair. Your criteria was 'pinnacle' though. The Americas Cup is unquestionably the pinnacle of sailing, just as the TdF is the pinnacle of road cycling.
Boxing - a world title is the pinnacle, without doubt. If you start making distinctions to justify...