No, not so many actually. Among infiltrators only the TGI has a damage bonus to assault rifles, and he will perform better with Harrier, Saber, Typhoon, etc. Among the other characters you mentioned -like the Destroyer for example- the Spitfire will not come either in the top 3-4 choices.
I don't know how you name a weapon that doesn't come as the best choice for any character and only as the n°4-5 choice for a half-dozen kits, but for me it's certainly not a great gun.
Damn it, I have to start paying more attention if somebody replies to me. Sorry about that.
It is not about damage output, I mean, slap Javelin or GPS on GI and you got that problem solved. It is much more about character of this gun, as I said standing there and ramboing with it. There are weapons that are perfect for some characters and there are characters that are perfect for some of the weapons, and IMO that is what gives so much charm to this game and why is there so much variety that kept us in game for so much.
For example, Hurricane is perfect for TSol, but TSol is also perfect for BPP. I guess it is about how we look at the game.