I do have 6 copies of NHL 94 myself, variants being the two Genesis ones (two limited, one the regular release), the SNES copy (2x) and the Japanese Super Famicom copy - which was a pain to get at a decent price, but mine is complete and in great shape. So @kingraph you don't seem to be missing anything to my knowledge on your list. I'd like to track down those CD copies but have yet to own a Sega CD so I'm not as motivated to grab those yet...
@CoachMac I do have both the SNES variants of NHLPA 93. Another annoying label variant that year was for NHL Stanley Cup, green and blue text on the spine of the label.
As for other EA games during this 92-95ish time period, I have cart-only copies of Championship Hockey for the Master System and Game Gear. Those were EU releases only and basically the 8-bit version of the original NHL Hockey with international teams. I also have EA Hockey for the Mega Drive, the international team version of NHL Hockey. I have the regular game and the EA Sports Doubleheader version (which includes EA Hockey and John Madden Football on the same cart). For the 95 releases I have pretty hard to find Complete-in-box copies of NHL Hockey 95 for Game Boy and NHL Hockey for Game Gear. The Game Boy versions of the NHL series are so terrible...
I also have both Elitserien games (2x of both). When my hockey buddies come over to play games we almost always play a game of Elitserien 95 or 96. Have to use the Retron5 since I don't have a modded Genesis/Mega Drive.