Veer & Garv would've been instant blockbusters.
And superhits & hits like Wanted & Mujhse Shaadi Karogi was only a hit so at this time it would've been a blockbuster too.
I want to name Jaan-E-Mann but it would become a blockbuster only because of the stardom. The movie in 2006 was a flop in India but average in overseas so it would've made it big for sure. Salaam-E-Ishq was a flop in India but a Hit in overseas so I think it would've atleast got itself an Hit status in India now with the hype.
London Dreams only with better music & better climax has chance at the box office, it lacked them both clubbed with weak direction & that's the reason why it flopped.
I wouldn't name Tere Naam because the timing of the remake was really good in 2003. The character in Tamil & Kannada were still college students while the Telugu remake starred Dr. Rajasekhar who was in his 40's & he was shown as college passed out guy who still sits infront of the college. Salman's character was shaped up based on Telugu, while Telugu was a flop, Hindi version successfully used that concept selling Salman as a 28-30yrs guy who still wanders infront of the college. That character cannot be sold now to the audience & with his current image (not action but being human) such films is a no.