I think a “Top Mods” search should cover you fairly well.

www.nexusmods.com/newvegas/mods/top/

You want the Scrips Extender first and foremost. Most mods depend on it.

The 4GB Patcher is also a must, if I remember correctly

After that Yukichigai Unofficial Patch - YUP should cover most of the bugs. (I can’t remember exactly how much it covers, just that it’s was an essential mod back when I was screwing around with it)

Other than that it’s a bit of trial and error. If a problem pops up or if one persists, look around for more specific patches.