I'm not including Crawford because he hasn't fought there, although when he does he will likely dive straight into the top 3. 1. Spence 2. Thurman 3. Porter 4. Horn I thought Garcia lost to Peterson and has done nothing of note really at 147, so he misses out. Currently, Welterweight really isn't that deep a division at all.
Thurman Spence Horny Porter For now. Spence is future King of WW. Thurman is getting it as soon as he decides to put his peace pipe down and climb back into the ring.
1. Thurman 2. Spence 3. Garcia 4. Porter 5. Horn I would pick Spence to defeat all of them at the moment.