Boy, it's quite an attainment to create something that is truly original for television, and Larry along with Jerry managed to do that. I assume they are more than set for life, long since. TV series of all kinds seem to come off an assembly line, making incremental changes following the same paths, including borrowed characters and sequels all along.
Seinfeld (whether you like it or not, and there are some reasons not to) is a remarkable comedy of manners. You have to go back to Moliere and Oscar Wilde to pick up the thread on its incisive social satire. Banality and brilliance in the same work. So, Happy Birthday, Larry. You old geezer and age-mate.