The best worst poet _ever_, his crowning glory being the ode to the Tay Bridge Disaster.
Beautiful Railway Bridge of the Silv'ry Tay!
Alas! I am very sorry to say
That ninety lives have been taken away
On the last Sabbath day of 1879,
Which will be remember'd for a very long time.
Also, JK Rowling, who spent way too much time in this kirkyard, named another character after McGonagall.