AND each of the marauders died protecting Harry. James died literally protecting him, Sirius died to go save him, Peter died allowing him to escape the prison, and Lupin died fighting with him at the Battle of Hogwarts. All of them died for Harry.
Um, they don't have light bulbs. So it would take 3 Ravenclaws. One to explain what a light bulb is after a ravenclaw took the light bulb and wiring apart and the last one to put the wires and light swich back together.
McGonagall wasn't dreading the next generation of Potter and Weasley kids. She did, however, keep track of how many of them would be attending Hogwarts all at once so that she could start to plan out Gryffindor's genetic all-star Quidditch team.