Very nice - even a snake. If you are willing to add some plastic, try and find the Airfix wagon train set - will provide another wagon, a mounted man, and some nice civilian figures to your collection.
Also, check out Knuckleduster's HO Old West miniatures - but be aware you will have to provide bases for the figures since they are meant for model railroading, not war gaming. But decent figures and should be a close match sizewise, especially for background civilian figures, etc.
Great to see a town that looks like a town - heck, it is even big enough to attract a bank robber's attention on pay day.
Hope to see more figures and game reports!
(Looks like Newline only has one pack of 20 mm Old West but maybe some of their ACW figures might be adaptable, confederates in slouch hats - probably skirmishers. Could add some mounted figures from that source.)