Adjust some documentation photographs of artwork in a gallery

I have some photos of documentation of an exhibition but the photos have various white balances and exposures. I want to have the photos edited so that the walls of the gallery look as white as possible, the images crisp and professional, and adjusted for any lens distortion and colour casts. You can look at the website Contemporary Art Daily ([login to view URL]) as a guide for the standard and style I need. The photos cannot look too heavily edited because they are 'documentation' so not looking for heavy contrast -- they need to be an accurate representation of reality but sharpened to professional style of presentation. I have RAW files and JPEGS.