1. Native River 169 when 1st in the 2018 Cheltenham Gold Cup
2. Native River 169 when 1st in the Welsh National (27Dec2016)
3. Sizing John 168 when 1st in the 2017 Cheltenham Gold Cup
4. Clan Des Obeaux 167 when 1st in King George VI Chase (26Dec2018)
5. Might Bite 167 when 1st in Aintree Betway Bowl (12Apr2018)
6. Thistlecrack 167 when 1st in King George VI Chase (26Dec2016)
7. Definitly Red 167 when 1st in Cotswold Chase (27Jan2018)
8. Bristol De Mai 166 when 1st in Betfair Chase (24Nov2018)
9. Native River 165 when 1st in Denman Chase (10Feb2018)
= Many Clouds 165 when 1st in Cotswold Chase (28Jan2017)
= Sizing John 165 when 1st in the Punchestown Gold Cup (26Apr2017)
= Kemboy 165 when 1st in the Leopardstown Savills Chase (28Dec2018)
Taking 2nd place (behind Kemboy) was Monalee and this horse is a model of consistency; as such, I reckon the handicapper has him just about spot on at OR159. Via Monalee, I rated the winning performance of Kemboy at 165: however, as he has won both of his completed races over a trip of at least 3-miles (he fell at the 1st-fence in the 2018 Irish National), he does have a lot of potential at staying trips.
What of the others in the Cheltenham Gold Cup picture?
Al Boum Photo who fell in the RSA Chase when looking like finishing 2nd, subsequently won over 2m4f at Fairyhouse, and then looked like winning the Champion Novice Chase over an extended 3-mile at Punchestown in April (Monalee had fallen 3-out) when running-out at the last fence! Had Al Boum Photo won that race his performance would have rated about 160+, which is about 4lb behind Presenting Percy. Al Boum Photo has also run is seasonal debut in the past fortnight, winning over 2m5f at Tramore in Ireland beating stable companions Total Recall in 2nd and Invitation Only into 3rd. While the performance looked impressive, as an indication of his Cheltenham Gold Cup potential is was inconclusive to me: for Total Recall (who won the Ladbrokes Trophy Chase at Newbury on 02Dec2017) this was a wholly inadequate trip, and Invitation Only was clearly in need of the race. For me, Al Boum Photo holds a better chance in the 2m5f Ryanair Chase rather than the 3m2f Gold Cup, but (even so) he just does not look good enough to win either race.
The only other horse I'm considering is DEFINITLY RED; who beat Bristol De Mai into 3rd in January last year. He flopped when returning for the Gold Cup last March but that was probably due to the strong pace set by Native River and Might Bite. Definitly Red is not a quick horse, and it seems no coincidence that his 3 NH Flat wins came on soft/heavy ground; but he is a strong stayer and coming into the Gold Cup fresh might see him nick 3rd-place at very long odds as he's 33/1 with Hills and Boyles.