List of aircraft which are not certified to be flown by one pilot
I dont know of any list off hand but the FAA publishes all their type certificates here which do contain the relevant information needed to compile such a list. As mentioned in the comments most small GA planes are single pilot certified so if we start with that assumption you will find a lot of lists that cover the topic of "the largest single pilot certified aircraft" like this one. These lists provide you with the ones that are on the fence size/speed wise.