This save file is made from a sterile playthrough with very little console command or mod related alteration. The first file is a full playthrough of all quests and nearly all content completed. At the time this save was made there were no DLC or mod pluggins active, however it was made while using the v1.2.0416 patch.
The second file is a continuation of the first but with all of the DLC content complete as well, such as Shivering Isles, Spell Tomes ect.

The game in this save is 100% complete as defined by TESwiki's article on 100% Completion.
You can read the 100% Completion article at this address:
http://www.uesp.net/wiki/Oblivion:100%25_Completion

Things completed:
-Character is level 50
-All 21 skills have been maxed to 100
-Each of the 7 attributes raised to 100
-All quests finished (with exception to quests that discharge you from a guild)
-All locations discovered
-All 306 Nirnroots collected
-All houses and horses bought
-All books (that are available post-completion) collected, including each edition of The Black Horse Courier
-All skill books read
-All spells available in-game aquired
-60 oblivion gates shut, 60 sigil stones collected
-All 94 stores invested in
-All leveled items are maxed
-Nearly all interior and exterior fow has been cleared from map
-All known secrets, unmarked quests, and easter eggs found
-All unique enemies killed
-Nearly all items (generic, magic, and unique) have been collected

DLC:
-Each quest (either marked or unmarked) for each DLC pluggin has been finished successfully
-All Items available in each DLC has been collected
-Shivering Isles items are being stored in the House of Mania master bedroom
-Knights of the Nine items are being stored at the Priory or the Nine in the undercroft
-Frostcraig Spire items are being stored in the Living Quarters, inside a chest next to the bed
-Mehrunes' Razor items are being stored in your house at the Imperial City docks
-Vile Lair items are being stored in the sleeping chamber inside of a desk
-Thieves Den items are being stored in the Captains' Quarters, inside of the two dressers at the entrance
-Fighters Stronghold items are being stored in the desk and chest in the private quarters bedroom
-All Spell Tomes (with spells not available in vanilla version) have been collected and stored in the vault at Frostcraig Spire
-Spell Tomes containing spells already available in vanilla oblivion have not been collected, but the spells themselves are already learned
-In Shivering Isles, character went all into Mania when completing each quest with exception to The Helpless Army
-All merchants in DLC have been invested in, including merchants that could not be invested in except through the use of either UOSIP or UOMP
-Ushnar's Skinned Hound is still alive
-All of the original knights (named) in KotN have survived the final battle
-Character has gained an additional horse, Old Nag, from the horse armor quest
-The new Gatekeeper: Helm of Power, Arm of Bashing, Arm of Fire Shielding, Breast of Life, Heart of Wound Sharing, and Legs of Fortitude
-Infamy has been reset to zero
-All FOW in Shivering Isles has been cleared, as well as FOW in new DLC areas
-All Amber and Madness matrixes have been used to produced enchanted weapons and armor
-Used console to obtain Syl's dress, Golden Saint armor, and Blessing of Dementia spell

Notes:
-The default character is an Imperial woman named Bianca, her sign is The Lover
-Character is a custom Adventurer class, but all skills are maxed anyhow
-Unofficial Oblivion Patch was used while making this playthrough
-No named npcs were murdered or accidently killed
-All welknyd stones and varla stones have been left untouched
-All Dark Brotherhood quests involving bonus rewards have been finished successfully
-Chose the Thornblade after The Wayward Knight
-Chose 'The Tamriel Terror' as arena nickname
-Character has never been arrested, never broken a lockpick, and has never contracted a disease
-Not all keys have been collected
-Not all notes and letters have been collected
-Not all npcs are at maxed disposition
-During quest Blood of the Daedra, I used the console to duplicate an artifact. All 15 daedric artifacts are in your collection
-All 90 Oblivion Gate locations are located on your map, however only 60 have been logged to your 'Places Found' stat so that it displays the correct 367 value
-Nirnroots and Shadowbanish Wines left over from their quests have been kept rather than turned in for additonal reward
-I've adjusted Vlanhonder Moslin and Etira Moslin's disposition with the console in order to keep them from fleeing when you approach them.
-Agnar the Unwavering and Andre Labouche have disappeared sometime after i looted thier corpses, UOP failed

This save was an attempt to create as generic a playthrough as possible, with little evidence of my personal decisions. Although most of the unique items in the game have been collected, i've tried to leave much of the games clutter untouched. Things like Welknyd Stones and other non-respawning items are still in their default locations.

Important:
This save has logged over 250 hours of gameplay and is beginning to show signs of the abomb glitch. This is normal, and can be fixed by using zBobGuy's Oblivion Animation Fixer program periodically. I used this program right before uploading, so it should be a while before you'll need to use it again.
You can find zBobGuy's OAF program here:
http://tesnexus.com/downloads/file.php?id=5127

Update:
This is the final version, however i will consider changes if you contact me.

I also have a similar save file for Fallout 3 which you can download here:
http://www.fallout3nexus.com/downloads/file.php?id=16766