This long-time image and video converter is absolutely amazing, and a bargain. Why? First of all: it supports the most exotic image formats (got a 20-year old back with some obscure, unreadable images on it? Changes are GraphicConverter just reads en converts it without issues!)
Secondly, it has comprehensive and capable image editing features.
But most of all it's the support from developer Thorsten Lemke. He's one of the most brilliant developers in my opinion. If you make an enhancement request he not only promises to look into it, he ACTUALLY adds it! In my case I asked for the possibility to map the original creation date of 15-year old AVI movies to the EXIF-field of converted MP4-movies, to be able to import them into Apples Photos app (provided him with some samples to better understand my request).
As a result of this request, he not only added this functionality, he even extended it: adding the option to CONVERT old AVI-movies to MP4-movies, while retaining the original(!) creation date. He even added it in the latest BETA, within several days after my request!!
I know of no other application in this price range that has this possibility (and I've been searching for it for hours). And of no other developer that does this.
So, just buy GraphicConverter, if only to support Thorsten. And in the slipstream you'll get a good image editor and an amazing image an video converter!