Indeed.
Gueye has a good pedigree but he is coming to the end of his career. Maybe a half decent manager could improve upon his very poor recent performances, but he won't have much time left at the top level.
Onana may be decent in the future, he had a good game against the RS, but my God he's been mostly awful ever since. At present, I've seen much more awful than anything else.
Garner looks championship standard, slightly better than Tom Davies.
Doucore is an absolute donkey. He could probably just about hack the championship, but I think he's more likely to have to go abroad to a weaker league.