You forgot the Vintage Line. This is what I get without variations and just basic carded. Did not include mailaways (Spirit Ben, Han Storm, Mace Sneak, Oola, Kabe & Muftak, B'Omarr) No Cinema Scenes, DLX, etc. ...
Yeah - as it turns out I left a lot of stuff out - I didn't include the 4 AOTC Preview Figs, the 4 ROTS Preview Figs, and the entire POTC line. I didn't include the Bikerscount POTJ variant, the ARC Trooper Clone Wars Variant, and the ROTS Royal Guard variant - that's a total of 26 more figures.
So, if you take just modern individually carded figures, my total comes up to 530 which is WAY past the 500 count.
So if you discount painting variants of the same release - that subtracts:
Clone Wars: 4
Clone Wars (Animated): 3
So you'd have to minus 12 from my tally bringing the number to 518
So there's still a huge discrepency regardless of whether or not you include the vintage line (which the tally for the 300th Fett DID include).
You only really start dropping the tally when you take the Cantina Han figure that first came out on POTF CommTech and then has been released to death in HOF, Saga, OTC and POTC (for example).