Annarami, if you want an agent, the Wrters' and Artsts' Yearbook will tell you who may be interested in the kind of book you write.
Also, authors often include thanks to family and agents in their own books, so that may give you a clue if you've read anything similar.
BTW, I don't think a 'weird' or non-happy ending will ever do for M&B! You really do need to know your market, know what sells, and what sort of reader you are targeting.
Finding an agent has never been easy, though, and I dare say it gets tougher all the time. I approached 6 before one finally took me on (a long time ago now BTW) and I had to do a lot of rewriting before she thought my novel ready to send out. (I'm happy to admit that it better afterwards - it can take a fresh eye to see what's wrong with something you yourself have read so many times.)
And that was a novel that ultimately did very well, including several sales of foreign rights.
And it wasn't my 'first' novel, BTW - I'd had plenty of rejections before that, and most published authors I know will say the same. I'm not saying this to put you off, but just to emphasise that persistence is often very necessary.
When you read about someone's 'first' novel, with a nice fat advance, it may well be their 11th, only the others never found a publisher.