Instead of chapel, try remake + fools gold + warehouse + any supporting card. There should be plenty of good results from that.
I made this work more effectively than Chapel at times, but other times I couldn't. It had more variance to it, than Chapel. Key issue seems to be ensuring you have two cards you want to trash, which Warehouse didn't always ensure, while Chapel is a little more graceful. Although its terminal it can trash from one to four. You want a draw of 3 Fool's Gold consistently in a Province game. Warehouse+Fool's Gold+Remake stays strong late in the game, but Chapel can stay fairly consistent, especially on that grab for four provinces.
I'll play with it more, but Warehouse will stump you, it can provide choices of a +5 buy, or trashing one card you want trashed and maybe one you don't. It works sometimes beautifully and other times provided choices with Remake that slowed you down. I'll work on it some more.
Steward works fairly well as well, slower than Chapel obviously, but can give you a little more dexterity later in the game.
Fool's Gold is a fun card, now that I've played with more, I like it. I'll try Mine+Fool's Gold, see how it goes.