Hey the list looks good!
Just a few pointers and changes I would make if I was running a list like this.
First off I run a SM - Gruts combo and its AWESOME! Level 7 casting YES PLEASE

Ok now that's over I would drop a Crown of command on him and stick him in your guts unit making them stubborn. He is T5 W5, Regenerating wounds every cast! Also if you roll on average on the maw lore you will end up with tooth cracker and/or guts. Making him T6! 4++!
For ogres I feel the stubborn crown is a must unless you are character heavy running fully defensive in a bus formation. Then you can deny a whole lot of CR and dish out a bucket load.
Level two firebelly is a good choice

I'd prefer to have him over a butcher

As for the Ring I'd stick with a dispel scroll. You will roll two spells on fire lore, if you get 1 good 1 bad, you trade it for fireball anyway.
The Bruiser, I don't think you can have Big names and a magic standard since the big name comes from your magic point allotment which you are denied because of the magic banner. A way to get around this is give the Iron gut unit the standard

no points changing just swapping things places
That is a mighty unit of iron guts my friend

Id be tempted to drop those leadies and add in 4 more

make that a hoard of guts since you are going that way already. Means you get 2 supporting ranks instead of 1!
Now imagine 3 ranks of S6 (or 7 with buffs) T5 4++ ogre goodness

People will refuse to play with you lmao. See battle report -
http://www.ogrestronghold.com/forum/index.php?topic=26804.msg353187#msg353187The MFC don't "need" the standard they are plenty killy on their own

however I would run them with Iron fists instead and take full advantage of being able to parry while mounted and also the 2+ armour save!
Its personal taste, but I wouldn't tend to add it

Leadies are hit and miss... literally

I love them, but when I need them they never perform. Then when I hit a unit because its just there and everything else is in combat I roll 20+ hits and wounds lol
Now on to man eaters... I love them, I like the look of them, their rules are awesome, they are reasonably priced (almost

) They have just never done anything for me

Ive tried pretty much every combo, but I just cant make them work. Its just the way I use them

they are a great choice, ask any ogre player. But it comes down to play style.
So to summarise my personal opinions -
Bruiser - Stick armour of destiny on him, put the standard in the guts.
SM - stick in crown of command
FB - drop GW and Dispel Scroll over ring
Guts - Bulk up to 18, move discipline standard to here.
Leadies - Either drop these or the Man eaters for more guts
MFC - GOOOOOOD

Man Eaters - Id prefer to drop these, 3 at this points level will be sufficiently out pointed to make them not worth their while. Where as the leadies can at least still clear enemy chaff!
Iron Blaster - mmmmmmmm... Go shoot some Skaven! They rank up nicely in their formations lol
Have a think and post back let us know.
Chris