behind the big cat's and bear's, who is the top predator?

[Styx38]

Leopards have a preference for adult feral/free-range/grazing Cattle in temperate zones. 

Also, these areas seem to lack major predators/competitors, which enables Leopards to have a go after big prey.


Iran: 

Leopards have a preference for both adult male Cattle (Free-grazing) as well as juveniles in Iran.

*This image is copyright of its original author

"(a) Male cattle are preferred by leopards because males have a larger body mass, and leopards in Iran are among the biggest; (b) juvenile cattle (calves and heifers) are preferred by leopards because they are easy to catch and thus are highly vulnerable to depredation; and © differently colored cattle are neither preferred nor avoided by leopards and taken according to the cattle availability. "


Khorozyan et. al. (2018) Cattle selectivity by leopards suggests ways to mitigate human–leopard conflict




China:

Leopard predation on Feral Cattle in China.


"Figure 2 shows the number of livestock preyed on by the north China leopard within the 4 year study period (2015–2018) in and around the Tieqiaoshan Provincial Nature Reserve. A total of 173 livestock were killed, out of which 125 (72%) were adult cattle, 40 (23%) were calves, and 8 (5%) were sheep.

This study shows that the number of livestock species killed by north China leopards in and around the Tieqiaoshan Provincial Nature Reserve differed significantly. Among the livestock, north China leopards killed more cattle. This is contrary to the findings of [3,25], who mentioned in their studies that leopard killed more goats, followed by sheep. This could probably be due to the reasons that goats are not domesticated in and around of this reserve, and most of the sheep kept are not free-range. Therefore, the free-range system of the farming of cattle practiced in and around the reserve makes it ideal for the north China leopard to prey them. In the free-range system, the cattle roam freely outdoors rather than being confined in an enclosure for 24 h each day"

*This image is copyright of its original author

source: Consolee et. al. 2020. Human-Leopard Conflict: An Emerging Issue of North China Leopard Conservation in Tieqiaoshan Provincial Nature Reserve in Shanxi Province, China Reply