I'll begin by apologizing for the upcoming big, nerdy and slightly patriotic post... :D
At the tippity top of my wish-list is any generation of Saab's primary fighters, (JA 37D mostly though). Admittedly, partly because I'm Swedish, but also because I just adore Saab's history of independent and sometimes eccentric designs to meet the requirements of our traditionally small and neutral country. I think it'd add some spiciness to the DCS universe with some more exotic aircraft and air forces aswell. (But I can see why they might not be considered since not as popular). Basically, I'd pay many monies for any of these with blue and yellow, "Three chrowns" roundels! OwO
Saab 21
1945 - 1951
Saabs first own fighter design! Designed during ww2 by request of the SwAF. Featuring a totally bonkers and awesome pushing propeller design, double tail booms and an early ejection seat. :D The logic being that it'd give unrivaled forward visibility and firepower being able to concentrate all the cannons in the nose. THe design was later discovered to fit well, (sort of), for the early jet era, and they were subsequentially turned into jetfighters in the late 40s, Saab 21R. R standing for "Reaktionsmotor" (Reactionary Engine). This was Saabs, and Swedens, first jet aircraft.
Saab 29 Tunnan
1950-1976
"The flying barrel" Despite it's looks, proved to be very fast and agile. It was certainly comparable to the contemporary Sabre and Mig-15. Setting the world speed record on a number of occasions. It's the only Saab jet fighter to have seen actual combat, fighting under UN flag in the Congo in the 60's where it was succesful.
Saab 35 Draken
1960-1999
Following new SwAF requirements of a fast, high-altitude interceptor that should also be able to operate from a secret network of small road-based airfields with hangars hidden deep inside the mountains. The result was this quite original double-delta, allowing both high speed and slow-speed maneuverability. This aircraft became an export success, being sold to 3 other countries aswell. (Okay, it counts as a success if you're a small company, backed by a small country!)
Saab 37 Viggen
1972-2007
To replace the Draken, a totally new approach to meet much of the same requirements and then some. Featuring yet another unique design with Canard wings and an engine with reverse-thrust. It was in a way an early multi-role aircraft. Attempts were made to export it to other small countries in Europe in the 70's as the "Eurofighter" ( :D ). But everybody opted for the newer and more boring looking American F-16! :P
Made in 4 different versions: AJ 37 (Primary attack, secondary interceptor), SH 37 (sea patrol, anti-ship attack), SF 37 (photo reconnaissance). But the best and the baddest was the JA 37, (Primary interceptor, secondary attack). Still very top of the line through upgrades when it was scrapped in 2007 because of budgets.. :(
My absolute favorite fighter. So big, badass and cool looking! Designed to fly radar-silent, at tree-hugging altitude at speeds well above mach 1, guided towards the enemy intruders by fighter command with sophisticated data-links. Then, when within range, pop up from no-where, climbing with lightning speed, (Viggen = Swedish for "Thunderbolt"), and fire all the Skyflash missiles and quickly RTB to rearm!
plis plis plis can we have in DCS?
What about Saab 32 Lansen, you say?
1956-1997
We don't talk about the Lansen. 1/3 were lost to accidents. o_o