I think people are overreacting with this injury. The only irreplaceable player in the squad is Partey IMO. Without Jesus, our attack will not be as potent, but we will score goals regardless. Also keep in mind that Nketiah has only played with our second string players who are nowhere near first team quality. Meanwhile Partey is fragile, and his "situation" hasn't been resolved yet.
We need to find a competent DM backup before we even think about another striker, because without Jesus we may not win the title, but without Partey we're definitely not getting top 4.
Unless of course Daddy Kroenke drops big bucks to reinforce our title charge and we splurge in January.