We used Jason Saragusa Concrete ###-###-####) for all the flatwork for our house, barn, and driveway last year, and he was EXCELLENT! He (& most of his crew, too, I think) is a KCK firefighter who has done concrete as a "side job" for many years - first for another company, and now for quite a while on his own. They are very hard-working guys, and we got great results even when they were pouring in 90+ degree weather. The ONLY possible downside would be if you were in a real super hurry to get something poured, since he has to work around his fire schedule. But, quality-wise, my husband was very impressed with their "full pours" (not just overdo gravel & use less concrete), how they set their forms, put in the re-bar, etc.
For tree removal, I would suggest Brandon Cole at ###-###-####. He does lots of general mowing/landscaping type stuff, but I know he did some extensive tree removal out at Lakeside Speedway. Full disclosure - he is a friend (and another KCK firefighter), and my husband has worked for him on big jobs occasionally, but we haven't actually had Brandon do work for us (just haven't ever needed it).
Good luck with your projects!
S.