ATG and it's not even close!
DAMN THIS IS TOO HARD.
I was so sure I was going to vote for CSiT because I remembered not being too hot on ATG, but I was actually thinking of Adrian's fighting-with-the-time-signature solo. Dave's is stellar.
I'm not Foro, but here you go:
005 / 039 / Wasted Years Adrian Smith
006 / 044 / Alexander the Great Adrian Smith
007 / 040 / Sea of Madness Adrian Smith
008 / 066 / Fear of the Dark Dave Murray
Best post-Somewhere in Time-solo of all (from Seventh Son of a Seventh Son to The Final Frontier)
009 / 084 / Blood Brothers Janick Gers
Best Janick Gers solo
Best post-Fear of the Dark-solo of all (from The X-Factor to The Final Frontier)
010 / 093 / Rainmaker Dave Murray
Best post-Fear of the Dark-Dave Murray solo (from The X-Factor to The Final Frontier)