Minwax Penetrating Stain in Weathered Oak would work well I think

That's gonna blotch like crazy without a great deal of skill. Not friendly to DIY. Leave it without a stain.

I have a trick to avoid the blotch, but never tried it on large area and it could be a bit costly. It is an old technique used to finish violins... First you take eggs and wisk them to a firm peak, then let them stand overnight at room temperature. You will get a liquid (albumen) in the bottom. After sanding, take the egg "juice" and apply it over the surface with a brush, let dry, sand (or steel wool) and repeat until totally smooth. THEN apply the finish. Gauranteed no blotching.

I'm sure there is something available commercially that does the same thing better suited for a large piece of furniture, but this is what I learned from a violin maker. In the violin world it is called a "ground" layer (coat) that seals the wood before applying the final finish.

A precoat of boiled linseed oil will reduce the blotching of stain especially at knots.

I used a wood conditioner first and then a mix of dark walnut and red sienna. We are currently in the process of sealing it.