There are Messy Galaxies and then there are Messier Galaxies. I like the Messier ones better.
Then there are the Messiest:
The Barfing Galaxy, the Drab Nebula, the DumbDumbbell.
M100 is a very nice member of the Virgo group
Just below is Markarian’s Chain. A truly wonderful site in low power.
That was for all of us.