I am no expert...but your plant looks fine to me. The tips of a few leaves are yellowing and that might be over-watering(???).

There is a tutorial on this website that simply explains how to imbed a photo in the post. You will probably get more responses if you try to do that.

Could it be early blight or another blight? I took my affected plant leaves to a local store where they have gardeners who have been gardening for years and that is what they told me I and my entire garden community had. If it is blight, remove all yellowing, dead branches with some clippers and throw the affected branches away. Sanitize the clippers after use. Water with a soaker or be careful with the hose so it doesn't splash up onto the plant. Some people will spray fungicide others will just remove the affected leaves and not spray anything. You may be able to do that too because we are far along in the growing season, at least in my area. My community garden is picky so I could only spray some potassium bicarbonate (bi-carb old fashioned fungicide). They do look a lot better now that I sprayed. Your plants are really robust looking so maybe just removing the leaves would be enough? The only thing is, is that if you have to remove too many leaves I've read it can cause some sun damage. I hope this helps and good luck!