He's a very grounded person and has been able to stay true to himself, his standards, and his beliefs, thus far. He has a lot of self-belief and relevant experience. EtH knows the team can be better and should be better, but there has to be gradual improvement and he knows exactly what is yet to come. Ole knew the standards United needed to get to, but because he never actually acheived those high standards as a manager with any good players, he ultimately failed to take the next big step(s).
Being surrounded by his loyal lieutenant in van der Gaag, wise head in McClaren, and drafting in McCarthy has been immense. They've all been part of something greater and of legitimate success, save for McCarthy, but he was very good on his own merit as a striker.
I don't mind if United do not get another forward in January. EtH will continue to adapt with what he has and get the best out of them. We shouldn't be compromising in the short-term (i.e. paying someone like Joao Felix for a temporary loan and knowing full well he's inbetween positions - not the CF we need, probably won't be able to push aside Marcus from his best position, hasn't shown anything he's capable of playing well off the right, etc.) for long-term gain.
Continue to develop the players and team as a whole and when the proper player(s) are available to make a geniune impact like Lisandro, Casemiro, Eriksen, then the boat should be pushed out as best as possible. United are about 3 pieces (CF/forward, GK, midfielder) away from having a competitive team, assuming the rest of the players continue to develop under EtH.