If a sport coat or odd jacket has texture or a nice pattern, then it can look good with jeans. Smooth, worsted wool that you typically see in suit jackets almost never looks good with jeans. I have two seersucker suit coats that I can pair with denim (I'm talking about raw, dark indigo) but that's it. In fact, I prefer to wear my seersucker coats with jeans, as a full on seersucker suit can be a bit much.
I'm partial to Italian Sport Coats with
tweed patterns. Obviously, Italy is warmer than the UK, and the coat fabrics tend to be finer and lighter, which suits the Mediterranean climate where I live.
I especially like
Gun Club Check. I personally own two Gun Club jackets; one is Cantarelli, and the other is Isaia Napoli. The Cantarelli is 100% cashmere. It's fully canvassed with horn buttons, and is an absolute pleasure to wear.
There is one main drawback for those (like myself) with champagne taste and a beer budget - these jackets usually retail for two or three grand apiece. However, I'm not above a little discount shopping! I picked up the Cantarelli from a guy on Style Forvm, and the Isaia was on sale at Sierra Trading Post. Eighty bucks for tailoring and I'm good to go.
Here are some examples of Gun Club Check:
This first jacket is Hermés and retails for a cool five G's. Looks like he's wearing jeans as well. The photo is from GQ.
Oscar de la Renta wearing Gun Club:
Jim Rockford has also been known to rock the Gun Club with denim.