Multistage Low Noise Amplifier
Low noise design starts with assessing the impedance level required. The best amplifier for a 1k source impedance (OPA211, 1.1nV) is not going to work well with higher impedance (2m whip antenna up to 100kHz) because of its large noise current. For your application you need a FET input amplifier as the front end.

You should start experimenting with something as simple as TL071, which although the noise is 18nV, has essentially no current noise, so suits your source well. A little bit of looking around will bag you FET input amps with lower noise voltage, but if you want the best, you should brew your own with discrete FETs, following the general ideas of Bob Pease in this article, using FETs instead of bipolars at the front end.

Then again, once you've consulted the atmospheric background noise spectrum in Kevin's post, do you need better than 18nV anyway?

Once your first stage has enough gain, the noise contribution of any subsequent stages becomes irrelevant. If your first stage has again of more than 3, and first and second stages have equal noise, the first stage noise will totally dominate the second stage.

Just a thought. At 100kHz, the wavelength is km, so a number of antennae is not a phased array, it's just a group of antennae, for any practical size. Use 4 antennae, into a quad amplifier, and add the outputs. Environmental noise will be correlated so will add as voltage, amplifier noise is uncorrelated, so will add as power. Every time you double the number of recievers, you improve the signal to noise ratio (SNR) by 3dB.