You forgot To mention the Hartford Yard Goats the very popular and successful Minor League Baseball in downtown Hartford on Main Street at Dunkin Park!
Just make sure to leave the city after 6:30. The city is not safe. That said. The Mark Twain House is the must-see attraction. Hartford Stage Company is one of the best regional theater companies in the US. The Atheneum is a great museum, not overwhelming like museums in NYC. Hartford has seen better days. Hopefully, their civic leaders can get it together and turn things around. It used to be a great little city, but problems with crime and poor public education, drove people with the means to go, out of the city. It's really unfortunate, because Connecticut is a state that values quality public schools.
If you want to see the real Hartford, spend a night in the frog hollow and the North End section of Hartford. You will get the real picture of Hartford.