I personally don't think you lose anything of actual substance skipping the incredibly overrated original Evangelion TV series, outside an amusing battle won via Dance Dance Revolution (yes, really).
you know i was about to go into a tyrade against the show, saying its the most overrated thing ever and doesn't really deserve it's title as "the best anime's ever" as the OP put it but whatever, seems like the only person posting in this thread who has seen it agrees anyways. Although Evangelion was the first anime i've ever seen outside of just casually watching whatever was on Adult Swim or Toonami (back in the day)
Also I think Evangelion 3.33 is out now but i don't know if it's been subtitled or not (then again, that could be moot if you're waiting for the Dub).
As for FMA I've only seen brotherhood, and am saving the original when i feel like re watching it. However, i'll probably give it a shot soon, since i didn't really realize it was that different.
And for Helsing Ultimate I deliberately waited for the entire series to be over before i started watching it and now i can watch the whole thing without forgetting what happened when i left off haha