Why are they so freaking rare?!? And whats a good one for a white human articact (i cant spell) deck
{Gideon jura}, {Elspeth tirel}, are great cards. {Elspeth the knight errant}, if you are not playing standard is awesome.
White Human Artifacts? No planeswalker that fit that really. There is:
{Gideon Jura}
{Elspeth Tirel}
{Elspeth, Knight-Errant}
{Ajani Goldmane} (Non-standard)
{Ajani, Caller of the Pride} (Standard playable)
are also mono white PW.
If you want to splash colours:
{Ajani Vegeant} is RW (Non-standard)
The dead {Venser the Soujourer} is UW (Standard until RtR).
{Sorin, Lord of Innistrad} is BW (Standard playable).
Not sure what theme/mechanic/format you are building around for a human artifact deck. But if its some sort of white weenie or equipment variant, you'll get benefits out of the buffs (especially in the form of +1 counters due to Ajani 1.0 and 3.0).
Just a side note: White has one of the most PW variants, not exactly rare.
{Gideon Jura} and {Ajani, Caller of the Pride} are my favorites.
I just got ajani!