You can be a Jack of all trade: having all skills or so at level 100. That will take you to level 81.
Remember, Jack of all trade means "good in all, master of none". But for a good build in Skyrim, I would just say "Master of few". The few being Enchanting and Alchemy.
You will have 2 main limitations in your build : Number of perk points (only 80 max) and .. Carry Weight limit (you will have to carry around A LOT of equipment). For example, you will have to carry a shield, a 2 handed weapon, a One Handed weapon, a dagger and a bow as weapons. As armor, at least one set of Light armor and 1 set of heavy armor... and 5-6 sets of clothes enchanted with different bonuses to cover all your non combat skills.
For the perk I would only take what looks like the most essential to me in each skill tree. Here what my skill set up would look like:
Smithing (4)
- Steel
- Elven
- Advanced Armor (will cover light AND Heavy armor)
- Arcane Smithing
Elven armor will take you to the cap with your Light Armor perks. Steel Plate will take you to the cap with your Heavy armor perks. And that' WITHOUT a shield.
Archery (5)
- Overdraw 2/5
- Eagle Eye
- Steady hand 1/2
Your bow will do about 140+ damage, depending on the type of bow you are using. Elven bow will do the best damage though, because of your smithing.
One-Handed (3)
You will do about 105+ damage with your weapon, depending on the type of weapon you are using. Elven weapon will do the best damage though, because of your smithing.
Two-Handed (3)
You will do about 125+ damage with your weapon, depending on the type of weapon you are using. Elven weapon will do the best damage though, because of your smithing.
Heavy Armor (4)
- Juggernaut 1/5
- Fist of Steel
- Cushioned
- Conditioning
Block (3)
- Shield Wall 1/5
- Deflect Arrows
- Elemental protection
The Goal here is to get the 50% elemental protection
Alchemy (7)
- Alchemist 5/5
- Physician
- Benefactor
So you can get +147% fortify potions. You will need all type of potions outside of poisons and invisibility (because you have the spell).
Sneak (4)
- Stealth 1/5
- Backstab
- Deadly Aim
- Assassin Blade
The left tree will not be necessary if you use Invisibiity and Muffle spell/enchantment.
Light Armor (4)
- Agile Defender 1/5
- Custom Fit
- Unhindered
- Wind Walker
Pickpocket (3)
- Light Fingers 1/5
- Night Thief
- Extra Pocket
Extra pocket will be much needed in this build
Speech (3)
You can sell any type of merchant to any merchant. Example, a Blacksmith will buy ingredients from you with this perk.
Lockpicking (5)
- Novice
- Apprentice
- Adept
- Golden Touch
- Treasure Hunter
In any other build I would NEVER put any points in this tree. It is useless, even more with the Skeleton key. But because it is a JACK OF ALL TRADE, i tried to make the best of it.
Enchanting (8)
- Enchanter 5/5
- Insightful enchanter
- Corpus enchanter
- Extra Effects
The Goal is to make pieces of apparel with +29% Smithing and Alchemy or Fortify (spells type). Also +48% archery/One-Handed/Two-handed.
Conjuration (6)
- Novice
- Mystic Binding
- Soul Stealer
- Summoner 1/2
- Atromancy
- Elemental potency
Atronach is more versatile than undead. and Jack of All Trades are about versatility.
Alteration (5)
- Novice
- Apprentice
- Magic resistance 3/3
Obviously, it is to get the much needed Magic resistance. Also detect life, waterbreathing and Paralyze are useful.
Restoration (4)
- Novice
- Regeneration
- Recovery
- Respite 1/2
Illusion (4)
- Novice
- Animage
- Kindred Mage
- Quiet Casting
Quiet casting appies tio all spells and even ... shouts... you know, a Quiet Shout
Destruction
- Novice
- Augmented Shock 1
- Desintegrate
I chose the Shock damage because it is the least resisted and because the Desintegrate is the most useful "low health" perk.
Final Word
As I said, Good in all but master of the few. All trees are covered, even if some like lockpicking are useless in my point of view. 80 perks spend. Also, I would advise 200 Magicka, 450 health and 450 Stamina, to be able to carry more. In the same idea, choose the Lover stone at the beginning and the Steed stone at the end game.
Critics are welcome