The Ella's meals are fine, and if you are mixing with rice or pasta then you are introducing textures - but even so, I wouldn't worry: one of dd1's friends wouldn't eat lumps at all until he was 18 months and he is just fine now.
The foods he will eat are healthy and balanced so I would be inclined to carry on giving him what he will eat to avoid the battles. You should introduce new foods every now and then to make sure that he doesn't get too "set in his ways", but don't force the issue - it is entirely normal for them not to try something, so you should offer it to him several times: once he is used to the way it looks he is more likely to try the taste. In a way he is being manipulative, but this is what they do - although I would agree with Heidi that lump refusal is to do with texture rather than being manipulative. They are trying to find out where the boundaries are and where the power lies and they learn very young that food is something they have control over. The best thing you can do for him is to let him know that there are rules about meals - not that he can't chose what he eats, and not that he has no control, but that some things are not okay.
We went through a really picky phase with dd1, and she would only eat 4 different meals for about a year - she lost 1.5kg, but she got through the other side and we don't have many problems with food now (although she is still a bit picky!). Tips for survival:
1 Don't spend hours making new foods that he won't eat - you'll just feel upset that he is not eating what you have made. Jars are absolutely fine, as are the Ella's pouches.
2 Offer him the foods that you know he will eat most of the time, but give new things occasionally (so maybe 1 meal every 2 days).
3 Decide what you are going to offer him for dinner (ie Ella's pouch followed by yoghurt) and then give him that - don't give him lots of alternatives, but do give him the yoghurt even if he doesn't eat the pouch.
4 Don't fight him - if he is turning his head away then offer it a couple of times then get him down from the table. When they are going through this phase they pick up on how you feel really quickly, so if you are getting upset and trying to force it, it will make things worse.
5 I would advise you to give snacks, although some people find this makes things worse. My experience was that it avoided the blood sugar changes which led to bad behaviour and food refusal.
By this age he shouldn't wake in the night from hunger - M never did, even when she only had some cheerios for breakfast and nothing else all day.
(((hugs))) - it's a really tedious phase, but he will get past it.