Kettle sours are your answer if you don't have the time or patience to wait a while. As others posted, a Berliner Weisse is a good place to start.
If you really like sours, it can be all about blending - but you need time for that. One of my favorite styles is Flanders Red. Back in 2013, I switched to fermenting in stainless because I don't like plastic and am afraid of breaking and getting injured by glass carboys. I had three glass carboys and debated whether to give them to our club's monthly raffle or find another use for them.
Enter the solera. The three carboys are all filled with Flanders Red of different ages. The "oldest" carboy is a blend of batches dating back to February 2013 and has two ounces of medium French toast oak cubes that have been in there the whole time to simulate the inside of a barrel/foeder. I've sealed it with a drilled natural cork and airlock to allow just a tiny bit of oxygen exchange which gives it a mild acetic character.
The "second oldest" carboy is one year behind the oldest one but has no oak cubes and is sealed with a carboy cap and airlock to try to minimize oxygen. The character in this carboy is a little "fruitier" and I've added some organic tart cherry concentrate with recent batches.
The "newest" carboy has a batch in it that is typically under a year old and is usually only moderately sour.
Each year, I get out my graduated cylinders and figure out blend proportions for a keg to be filled from the three carboys. I always leave at least a half-gallon in each of the older two carboys - the idea being to develop "terroir" in the system over time. Once I've blended the batch into the keg, I top up the oldest carboy from the second oldest (and some from the newest if necessary), then top up the second oldest from the newest. That leaves the newest carboy empty and ready for a new batch. I only handle/clean one glass carboy once or twice a year and, for me, that's a risk worth taking for the beer that the solera produces.
Maybe this isn't for you, or maybe you don't have the space for something like this - but it's a lot of fun and brings a really different aspect to brewing. I'm hoping that my next adventure (if I can find the space in the basement of my small house) will be to brew-up a large batch - maybe 15 gallons or so - of straight Lambic for blending. Brewing it won't be the problem - I need to find the right vessel and space for long-term storage. And then there's my new foray into mead....