Best co sleeper?

Hey mommas! Any advice from mommas who have co slept? My first 2 slept great in their own beds, but this little almost 10 week old will not sleep on his own. I have tried sooo many things and I'm officially exhausted. He is up every hour. And even staying consistent and putting him right back in his bed hasn't helped. And I get too nervous having him just laying in the bed that something will happen but it is the only way he sleeps. And with a 3 and 4 year old running around all day, this momma needs sleep 😴 soooo, if anyone has a co sleeper that goes in the bed that you highly recommend, Id love to know about it.

Thanks so much!