@SlowRideLBC: The only other band I would suggest that has a sound pretty similar to Helicon Blue is Sleeper Set Sail, which was Casey Baker's old band and is every bit as incredible (Baker was the one who wrote City and Colour's Casey's Song, thus the title).
Been listening to this band religiously for years (yes all 9 songs). Such an awesome, unique sound. I cant find anyone who sounds anything like them which is a bummer but I'm thankful for such originality. Love putting them on repeat on a rainy day and just relaxing. Dallas is the man!