Holandaise and poached egg would be delicious over crab! I would probably hit it with a little Old Bay seasoning, and perhaps a splash or two of Tobasco to keep things authentic.
Do you not like the taste of poached egg? Or just hate making it? I suppose you could make a mini omelette and fold it into quarters before assembling it, if you dislike a poached egg, or just fry it sunny side up with a lid on until the yolk sets.
Poaching an egg is dead simple, really. Just bring a few inches of water to a gentle simmer, and crack an egg into a bowl (to make sure the yolk isn't broken), then gently lower it into the water to poach. As long as it's at a simmer, the egg should not stick to the bottom. You can fish off some of the excess egg whites floating to the top while its cooking with a slotted spoon. Then just gently lift the egg out with the slotted spoon onto a smooth plate and blot out any excess water.
I would also suggest the Julia Childs blender method for a Holandaise sauce.