My renewable resource sport coat, 100% Bamboo. Allen Edmonds Berkshires.
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I don't know if it's the angle of the shot, but as a proportion of your height, it appears to be quite long. And, I have no particular issue with pocket squares and denim - I mean, if you are wearing a blazer with denim anyway, you're already way past some people's limits on what is acceptable!
For me, I would go for something that had a bit more serious texture up top. And some better jeans. I generally favour Harris Tweed with some nice Japanese selvedge jeans in this context.
almost mid-life crisis jeans with long blazer are not flattering.