the Video Toaster has to be #1
I know this is NTSC only, but this is really what put Amiga on the map here in the States
#2 A1000 as this started it all
#3 Magni 4004, 4004S & 4005 with Magni 4010 This was an amazing genlock
#4 Deluxe Paint series (particular III and on)
#5 A2000
#6 early GVP 68030 CPU slot boards with SCSI and memory.
#7 A3000D my personal favorite
#8 RTG boards picasso II, EGS, followed by CV 64 and Picasso IV
#9 Digipaint and DCTV
#10 GVP A500+ HD8 and A530
Sorry no AGA amigas. They were too little to late here in the States.