No worries.
I’m looking for a photo of the man I want, but I think he might have been the invisible man.
Not the bloke I wanted, but from the same lot so he’ll do.
A man of immense power and influence in his sphere, but not a commander.
In response to the overwhelming interest in this question :rolleyes:, I shall surrender to the incessant demands for a clue 
:D.
He was an éminence grise whose influence declined after he imported his mistress into his commander’s domain.
I can only speak for my self but my silence had nothing to do with disinterest, at least for me it’s a tough nut.
My first vague assumption of Colonel Robert E. Hogan of “Hogan’s Heroes” has now been disproven by your hint. 
Stand by. I’ll find and post another picture of him, at an earlier stage of the war. Might take a while to find, crop, and upload.
The faded area on the right in the photo I’ll post isn’t an attempt to conceal his badges of rank, but just the way the photo is.
He’s of general rank.
Here he is, a few years earlier.
Before his dick got him in a bit of a wringer with his boss.
Sorry, I’m looking just not knowing. These quiz threads are tough. And I thought I paid attention in history class;)
Don’t apologise!
None of the questions in this thread are likely to have come up in any history class, anywhere.
The whole aim is to post people that even most well-informed military history people aren’t likely to know about, or can’t recognise in context, so there’s no shame in not being able to identify them. Most history teachers couldn’t. Most of us can’t. 
This clue will be either distracting or helpful, depending upon the level of knowledge about my mystery man and where he operated, but if you can pick the photo below you’ll know the surname of one of the cabal who operated with the mystery man in probably the longest and most enduringly successful operation of its type during WWII, which had nothing to do with the battlefield.
Anyone pick Diller?
Phyllis, that is. http://www.wic.org/bio/pdiller.htm
Who, as far as I know, had nothing to do with her namesake who was a grand part of the cabal with the mystery man.
I’ll widen the scope to give a better clue. Although the pick Diller clue would have helped someone who knew about what obviously isn’t as well known as I thought.
I actually recall hearing of someone that was a rising star in the US military until he openly pampered his girlfriend.
If he was smart like Ike, he’s of made her his driver.
Or his niblick, or putter.
Brigadier-General LeGrande Albert Diller?
Also known as ‘Pick’ Diller. Well done.
Who was the bloke I wanted but I couldn’t find his picture, on the internet or in books.
So, alas, it’s not Pick Diller, but you’ve narrowed it down to someone in that small circle who also controlled the flow of incoming and outgoing information and, unlike Diller, also controlled access to the big boss and could make or break people with his power.
Major-general Richard Kerens Sutherland
Correct. Well done!
Your turn.
Another officer with a less than successful career.
Is anyone looking at this? Would you like a clue?
When and where this picture was taken it was cold.
I’d worked that out.
A clue or clues would be nice.
Hat looks odd, but is he British?
He held the rank of ******* General and was dismissed from his final command after only a few days.
Rumors abounded he was drinking heavily but he always claimed it was political.
Unusually for a previously successful officer in a time of war, he wasn’t demoted but removed from the officers list.