You can indeed use RadImageEditor
for JPG files and RadPdfViewer
for PDF files. When it comes to TIFF, the format is currently not supported. This is already in our to-do list, but it's currently not scheduled and I cannot engage with a particular time-frame for its availability. You can track our progress on the matter here
In the meantime, RadImageEditor is highly extensible and you can create your own format provider as explained in this article
and demonstrated in this blog post
I hope the provided information is helpful! Let us know I you need further assistance.
All the best,